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Overview

The details

Course: Marine Biology

UCAS code: C164

Start date: October 2025

Study mode: Full-time

Duration: 3 years

Location: Colchester Campus

Based in: Life Sciences (School of)

The majority of life on earth is found under the sea, but most of it remains to be explored. Tropical reefs, deep-sea trenches, seagrass meadows and frozen polar seas are all individually unique and complex environments, but connected within Earth's single, vast ocean. By joining our BSc Marine Biology course, you will be immersed in this fascinating ocean world.

At Essex, you will begin your journey through diverse marine ecosystems from day one. Our team of internationally-renowned academic staff will introduce you to ocean systems and marine ecology through their own research on topics as varied as coral reef conservation, fisheries management, animal behaviour, marine biotechnology, and microbiology. These are taught alongside key scientific skills, including data analysis and interpretation, literature research, and presentation skills to give you a concrete foundation for your scientific career.

You will develop the concepts introduced in lectures through extensive, practical, hands-on experience in the laboratories of our STEM Centre, as well as in the field. Our local estuaries and coastal ecosystems are a natural laboratory on our doorstep. You will investigate the diversity of beautiful Essex salt marshes and interact with key people working to improve our coastline, including Essex Wildlife Trust, the Environment Agency and Colchester Oyster Fisheries. Later in your degree are opportunities to travel to field locations in Scotland, Greece and Indonesia (subject to additional costs) to apply what you have learned. During a trip to Indonesia, in the heart of the Coral Triangle, you will learn to dive and participate in unique underwater research surveys and lectures.

After completing core modules, you will move on to more advanced and specialised modules driven by our departmental research expertise.

In the final year, you will have the opportunity to select an independent research project through which you can further develop your own interests. Previous topics have included:

studies on oyster fisheries and water quality with local industry
fieldwork on sea turtle ecology in Greece
identifying coral reef conservation strategies in the Caribbean and Indonesia.

Visit our course pages for BSc Ecology and Environmental Biology and BSc Global Sustainability to explore our other environmental science undergraduate degrees.

Sustainability at Essex

We're proudly ranked 95th (10th in the UK) for promoting the United Nations Sustainable Development Goal for life below water (Times Higher Education Impact Rankings 2025).

To learn about the initiatives and actions the University of Essex is taking to tackle the climate and biodiversity crises, visit our sustainability page.

Why we're great.

Join field courses covering our local Marine Conservation Zone, tropical Indonesia and the Mediterranean Sea, studying everything from temperate shores and salt marshes to tropical mangroves and coral reefs.
Access our fantastic new aquatic biology research aquaria and research laboratories.
We are ranked 1st in the UK for biology (The Mail University Guide 2025) and 7th for biology (non-specific) for overall positivity score (National Student Survey 2024, English broad-discipline higher education institutions).

Study abroad

Your education extends beyond the university campus. We support you in expanding your education through offering the opportunity to spend a year or a term studying abroad at one of our partner universities. The four-year version of our degree allows you to spend the third year abroad or employed on a placement abroad, while otherwise remaining identical to the three-year course.

Studying abroad allows you to experience other cultures and languages, to broaden your degree socially and academically, and to demonstrate to employers that you are mature, adaptable, and organised.

If you spend a full year abroad you'll only pay 15% of your usual tuition fee to Essex for that year. You won't pay any tuition fees to your host university.

Placement year

Alternatively, you can spend your third year on a placement year with an external organisation. This is usually focussed around your course, and enables you to learn about a particular sector, company or job role, apply your academic knowledge in a practical working environment, and receive inspiration for future career pathways.

If you complete a placement year you'll only pay 20% of your usual tuition fee to Essex for that year.

Our expert staff

As one of the largest schools in our University we offer a lively, friendly and supportive environment with current, research-led study and high-quality teaching. You will benefit from the wide expertise of our research-active academics and their pioneering work on marine issues of national and global importance.

All of our academic staff conduct their own research and have professional expertise that you will benefit from through your studies. From genes to cells, whole animals and through to communities and ecosystems, our marine biology academics design course materials that make their world-class research accessible and inspiring.

You will have the flexibility to specialise in areas that interest you most and work with academics from our Ecology and Environmental Microbiology Research Group including:

Learning about Earth's largest unexplored habitat, the deep-sea, with Dr Michelle Taylor – the President of the Deep-Sea Biology Society and BSc Marine Biology course director.
Understanding cutting-edge biotechnological approaches towards preventing and cleaning-up marine pollution with Dr Boyd McKew, Dr Nick Aldred and Professor Terry McGenity.
Studying corals, coral reefs, seagrass beds and mangrove systems with Professor Leanne Hepburn and other expert staff in our School of Life Sciences.
Learning about animal behaviour, movement and connectivity with Dr Anna Sturrock, a leading fish ecology researcher.
Understanding the evolution and phylogenetics of marine and freshwater species with Dr Jennifer Hoyal Cuthill who applies machine learning to understanding speciation.
Learning about the importance of marine and freshwater sediments in climate change and monitoring ocean health with our team of environment experts including Professor Alex Dumbrell and Dr Natalie Hicks.

We are proud that one third of students at the University of Essex are from outside of the UK. The University has a Women's Network to support female staff and students, and the School of Life Sciences has been awarded the Athena Swan Silver Award (2020) reflecting the work carried out by staff in our School to improve equality. Measures include a mentorship scheme, support for postdoctoral research staff and financial help towards childcare costs for academics who wish to attend conferences.

Specialist facilities

Recent investment by our University has allowed for major refurbishment and expansion of our School of Life Sciences:

Work in an open and friendly department, with shared staff-student social spaces.
Conduct your final-year research alongside academics and PhD students in shared labs.
Access new research aquaria for studies of tropical, temperate, marine, and freshwater systems.
Use state-of-the-art research facilities from behavioural analysis systems and our advanced bioimaging facility to drones for remote sensing surveys.
Teaching facilities including new undergraduate laboratories.
Receive training in your first year on using the Oxford Nanopore MinION, a portable handheld device that can sequence genomes in real time.
Join national and international field courses in Plymouth, Millport, Greece, and Indonesia to learn the latest field techniques.

Your future

As the world's environmental problems worsen, the demand for qualified marine biologists and ecologists continues to grow.

Your degree in marine biology will open up wide-ranging career opportunities, including further study, careers in conservation, science writing and editing, as well as commercial research or consultancy for governmental or non-governmental organisations.

Our past students have taken up work in research laboratories, consultancies, business and industry, conservation practice and environmental assessment. Some have gone on to work in the commercial sector, while others still have chosen to enhance their career opportunities by studying for MSc degrees or PhD degrees.

Recent graduates now work for the following high-profile organisations:

Marine Biology Research Manager at Hive Ventures
Process Scientist at Thames Water
New Earth Solutions
Engine Group
Cromwell Council
DEFRA
Operation Wallacea
BBC

We also work with our University's Student Development Team to help you find out about further work experience, internships, placements, and voluntary opportunities.

"After graduating from Essex I was appointed as a research supervisor at the Archipelagos Insitute of Marine Conservation in Greece. Through researching the marine ecosystems of the Mediterranean Sea, I was exposed to a very different environment to the estuaries and salt marshes of Essex! From shallow coastal seagrass meadows to deep-sea coralligenous habitats, and the vast diversity of fish and invertebrates they host. My journey into environmental research progressed when I was offered a research Masters back at Essex. In collaboration with Project Seagrass, I will be focusing on seagrass restoration and recovery in the southern North Sea, hoping to further this important research and potentially contribute towards climate change initiatives."

Alice Malcolm-McKay, BSc Marine Biology, 2020

Entry requirements

Clearing entry requirements

We currently have places available in Clearing across a range of our courses with most offers at BBC-CCD (112 – 88 UCAS tariff points) or equivalent. We consider each application individually and requirements may be lower for some of our courses, so please get in touch if your grades are below those outlined here.

English language requirements

English language requirements for applicants whose first language is not English: IELTS 6.0 overall, or specified score in another equivalent test that we accept.

Details of English language requirements, including component scores, and the tests we accept for applicants who require a Student visa (excluding Nationals of Majority English Speaking Countries) can be found here

If we accept the English component of an international qualification it will be included in the academic levels listed above for the relevant countries.

English language shelf-life

Most English language qualifications have a validity period of 5 years. The validity period of Pearson Test of English, TOEFL and CBSE or CISCE English is 2 years.

If you require a Student visa to study in the UK please see our immigration webpages for the latest Home Office guidance on English language qualifications.

Pre-sessional English courses

If you do not meet our IELTS requirements then you may be able to complete a pre-sessional English pathway that enables you to start your course without retaking IELTS.

Pending English language qualifications

You don’t need to achieve the required level before making your application, but it will be one of the conditions of your offer.

If you cannot find the qualification that you have achieved or are pending, then please email ugquery@essex.ac.uk .

Requirements for second and final year entry

Different requirements apply for second and final year entry, and specified component grades are also required for applicants who require a visa to study in the UK. Details of English language requirements, including UK Visas and Immigration minimum component scores, and the tests we accept for applicants who require a Student visa (excluding Nationals of Majority English Speaking Countries) can be found here

Additional Notes

If you’re an international student, but do not meet the English language or academic requirements for direct admission to this degree, you could prepare and gain entry through a pathway course. Find out more about opportunities available to you at the University of Essex International College

Structure

Course structure

Our research-led teaching is continually evolving to address the latest challenges and breakthroughs in the field. The following modules are based on the current course structure and may change in response to new curriculum developments and innovation.

We understand that deciding where and what to study is a very important decision for you. We'll make all reasonable efforts to provide you with the courses, services and facilities as described on our website and in line with your contract with us. However, if we need to make material changes, for example due to significant disruption, we'll let our applicants and students know as soon as possible.

Components and modules explained

Components

Components are the blocks of study that make up your course. A component may have a set module which you must study, or a number of modules from which you can choose.

Each component has a status and carries a certain number of credits towards your qualification.

Status	What this means
Core	You must take the set module for this component and you must pass. No failure can be permitted.
Core with Options	You can choose which module to study from the available options for this component but you must pass. No failure can be permitted.
Compulsory	You must take the set module for this component. There may be limited opportunities to continue on the course/be eligible for the qualification if you fail.
Compulsory with Options	You can choose which module to study from the available options for this component. There may be limited opportunities to continue on the course/be eligible for the qualification if you fail.
Optional	You can choose which module to study from the available options for this component. There may be limited opportunities to continue on the course/be eligible for the qualification if you fail.

The modules that are available for you to choose for each component will depend on several factors, including which modules you have chosen for other components, which modules you have completed in previous years of your course, and which term the module is taught in.

Modules

Modules are the individual units of study for your course. Each module has its own set of learning outcomes and assessment criteria and also carries a certain number of credits.

In most cases you will study one module per component, but in some cases you may need to study more than one module. For example, a 30-credit component may comprise of either one 30-credit module, or two 15-credit modules, depending on the options available.

Modules may be taught at different times of the year and by a different department or school to the one your course is primarily based in. You can find this information from the module code. For example, the module code HR100-4-FY means:

100

The department or school the module will be taught by.

In this example, the module would be taught by the Department of History.

The module number.

The UK academic level of the module.

A standard undergraduate course will comprise of level 4, 5 and 6 modules - increasing as you progress through the course.

A standard postgraduate taught course will comprise of level 7 modules.

A postgraduate research degree is a level 8 qualification.

The term the module will be taught in.

AU: Autumn term
SP: Spring term
SU: Summer term
FY: Full year
AP: Autumn and Spring terms
PS: Spring and Summer terms
AS: Autumn and Summer terms

COMPONENT 01: CORE

Quantitative methods for Life Sciences

(15 CREDITS)

Develop your skillset and boost your CV. This module prepares you for the coursework, laboratory practicals and research projects that you will encounter during undergraduate study. Get to know referencing systems and learn how to effectively communicate scientific information. Use scientific units and simple algebra and demonstrate understanding of logarithms, exponentials, geometry and elementary calculus. Learn how to design experiments, handle data and display, interpret and analyse basic statistics. Teaching and learning will be through a mixture of lectures, classes, practicals and tutorials, with an emphasis on developing the key transferable skills needed for a career in biosciences.

View Quantitative methods for Life Sciences on our Module Directory

COMPONENT 02: COMPULSORY

Marine Biology Field Skills

(15 CREDITS)

Develop practical field skills that are critical for any practicing Marine Biologist. Spending one week at the Marine Biological Association of the UK in Plymouth, you gain key knowledge of marine invertebrate and algal identification, classification and distribution, developing skills in experimental design, field data-collection and data analysis. Please note that students make their own travel arrangements for this modules. As part of this module you will be required to attend a field trip to Plymouth to the Marine Biological Association of the UK (MBA) where you will develop your field research skills in Biology. The cost for this trip is approximately £50, which you will need to pay. This module has been designed to enable students to integrate their subject knowledge with an understanding of sustainable development, acquiring the skills and competencies essential for addressing the urgent sustainability challenges of the 21st century.

View Marine Biology Field Skills on our Module Directory

COMPONENT 03: CORE

Genetics and Evolution

(15 CREDITS)

Why do we all look different? Are some illnesses hereditary? Are animals born ready-suited to their environment? From the early theories of Mendel to modern studies in molecular genetics, you explore how scientists have answered these questions over the last 150 years. Examine how the structure and function of DNA allows genetic material to be expressed, replicated and inherited, and consider how genetic variation leads to adaptive evolution. From developing new technologies in gene cloning to the applications for modern medicine, you explore how geneticists are building on the earlier achievements in this fundamentally important field to enhance our understanding of life on earth.

View Genetics and Evolution on our Module Directory

COMPONENT 04: CORE WITH OPTIONS

(15 CREDITS)

COMPONENT 05: CORE

Microbiology

(15 CREDITS)

Microbes are essential for life, playing a vital role in connecting the health of humans, animals, and ecosystems. They aid in digestion, provide essential vitamins, and contribute significantly to our overall health and well-being. Marine microbes, for instance, produce approximately one-third of the oxygen we breathe. Additionally, microbes are indispensable for achieving the United Nations' Sustainable Development Goals, as they clean up pollutants and synthesize valuable products like antibiotics. However, not all microbes are beneficial - some cause devastating diseases. Despite significant advances in treatment and prevention, the incidence of infectious diseases continues to rise. In this module, you will explore the vast diversity and evolution of mostly beneficial microbes, alongside the pathogenicity of harmful ones. You will investigate how different viruses and bacteria invade, interact with, and replicate within their hosts. Through two practical sessions in our state-of-the-art teaching laboratory, you will study a food poisoning outbreak and will gain hands-on experience in growing, observing, purifying, counting, and even killing microbes. These sessions will equip you with highly sought-after skills, including aseptic technique, serial dilution, and data analysis.

View Microbiology on our Module Directory

COMPONENT 06: CORE

Animal Evolution, Ecology and Behaviour

(15 CREDITS)

The diversity of life on planet Earth is breath taking. We share our home with a vast number of species, a large portion of which are animals. We will discover the diversity of animal forms and functions and the role of natural selection in determining individual behaviour such as foraging, breeding and predator escape. You also investigate the idea that nothing in ecology and evolution makes sense in isolation. This module has been designed to enable students to integrate their subject knowledge with an understanding of sustainable development, acquiring the skills and competencies essential for addressing the urgent sustainability challenges of the 21st century.

View Animal Evolution, Ecology and Behaviour on our Module Directory

COMPONENT 07: CORE

Marine Ecology

(15 CREDITS)

The marine realm covers 70% of the Earth's surface. It contains ice-covered seas and hydrothermal vents, muddy estuaries, deep ocean trenches and the clear blue open sea. The oceans and seas are also integral to the whole earth-ocean-atmosphere system, which controls the climate and conditions for life on Earth. Discover the different marine environments, the organisms that inhabit them and their ecological interactions. You also investigate the physical and chemical conditions that determine the diversity of marine life and consider how human activity is influencing marine ecosystems, through overfishing, pollution, and climate change. This module has been designed to enable students to integrate their subject knowledge with an understanding of sustainable development, acquiring the skills and competencies essential for addressing the urgent sustainability challenges of the 21st century.

View Marine Ecology on our Module Directory

COMPONENT 08: COMPULSORY

Transferable Skills in Life Sciences

(15 CREDITS)

You will develop your transferable skills in scientific writing (including referencing and avoiding plagiarism), teamwork and communication through oral presentations, study and research skills (including essay writing, lecture note taking, use of library and databases). Teaching and learning will be through a mixture of lectures, classes, and tutorials. The emphasis will be on small group, tutorial-style teaching and interaction with other students on this module, with assessments tailored to your degree subject area.

View Transferable Skills in Life Sciences on our Module Directory

COMPONENT 01: COMPULSORY

Biodiversity: From Genes to Ecosystems

(15 CREDITS)

Examine how competition, predation, herbivory, mutualism, disease and parasitism affect the distribution, abundance and growth of populations, and how populations interact to affect the structure and dynamics of ecological communities. You apply this ecological knowledge to real-world problems, such as pest control and conservation. This module has been designed to enable students to integrate their subject knowledge with an understanding of sustainable development, acquiring the skills and competencies essential for addressing the urgent sustainability challenges of the 21st century.

View Biodiversity: From Genes to Ecosystems on our Module Directory

COMPONENT 02: COMPULSORY

Professional skills for Ecological and Marine Scientists

(15 CREDITS)

In this career-focused module you develop skills specific to your discipline, such as information retrieval, data-analysis and interpretation techniques, as well as a broader range of transferable skills, such as communication, team-work, numeracy and attention to detail. Learn how to best approach job applications, including CV and cover letter writing, aptitude testing and the interview process.

View Professional skills for Ecological and Marine Scientists on our Module Directory

COMPONENT 03: COMPULSORY

Marine Vertebrates

(15 CREDITS)

The importance of marine vertebrates to our aquatic systems cannot be underestimated, yet some of our most iconic underwater species are under serious threat. This module focuses on the taxonomy, physiology, ecology and conservation of the top predators and keystone species, including (but not limited to), whales, dolphins, sharks, rays, manatees, marine turtles and sea snakes.

View Marine Vertebrates on our Module Directory

COMPONENT 04: OPTIONAL

(30 CREDITS)

COMPONENT 05: OPTIONAL

(30 CREDITS)

COMPONENT 06: OPTIONAL

(15 CREDITS)

COMPONENT 07: COMPULSORY

Estuarine and Coastal Ecology Field Module (Assessed in Following Year)

(0 CREDITS)

This module concentrates on the relationship between biological diversity, and aspects of water chemistry and habitat structure in different coastal environments situated along an estuarine gradient. We will be using the Colne / Blackwater estuary complex as our field site.

View Estuarine and Coastal Ecology Field Module (Assessed in Following Year) on our Module Directory

COMPONENT 01: COMPULSORY

Research Project in Life Sciences

(45 CREDITS)

This module aims to prepare you for carrying out an individual scientific investigation on a topic relating to your degree. Develop skills to identify a suitable question and then design an experimental approach to obtain data addressing this question. The assessment focuses on your analysis and presentation of these data in a suitable scientific paper format report, on the research, understanding and critical writing about the scientific literature relating to your project. Your oral project presentation skills and response to questions, the planning and management of your project work, your progress reflection and your employability skills will also be evaluated. This module has been designed to enable students to integrate their subject knowledge with an understanding of sustainable development, acquiring the skills and competencies essential for addressing the urgent sustainability challenges of the 21st century.

View Research Project in Life Sciences on our Module Directory

COMPONENT 02: COMPULSORY

Estuarine and Coastal Ecology Field Module

(15 CREDITS)

Investigate the relationship between water chemistry and habitat structure, and biological diversity of coastal environments. Getting hands-on in the local Colne/Blackwater estuary you gain experience in assessing environmental variables, sampling protocols and general fieldwork skills. You learn to identify a wide variety of animals and plants at different salinities, as well as associated habitats such as freshwater grazing marshes and salt marshes. You are also trained in commonly used lab techniques, such as measuring phosphate concentrations and sediment properties. This module has been designed to enable students to integrate their subject knowledge with an understanding of sustainable development, acquiring the skills and competencies essential for addressing the urgent sustainability challenges of the 21st century.

View Estuarine and Coastal Ecology Field Module on our Module Directory

COMPONENT 03: COMPULSORY

Fisheries Ecology

(15 CREDITS)

Fisheries provide food and employment to millions of people across the globe. Get to know the social and economic drivers of fishing and explore the subsequent impact on marine ecosystems. You gain an understanding of the scale and significance of fisheries and learn to critically analyse the methods used to assess their efficacy. This module has been designed to enable students to integrate their subject knowledge with an understanding of sustainable development, acquiring the skills and competencies essential for addressing the urgent sustainability challenges of the 21st century.

View Fisheries Ecology on our Module Directory

COMPONENT 04: OPTIONAL

(15 CREDITS)

COMPONENT 05: OPTIONAL

(15 CREDITS)

COMPONENT 06: OPTIONAL

(15 CREDITS)

Placement

On a placement year you gain relevant work experience within an external business or organisation, giving you a competitive edge in the graduate job market and providing you with key contacts within the industry. The rest of your course remains identical to the three-year degree.

Year abroad

On your year abroad, you have the opportunity to experience other cultures and languages, to broaden your degree socially and academically, and to demonstrate to employers that you are mature, adaptable, and organised. The rest of your course remains identical to the three-year degree.

Teaching

Courses are taught by a combination of lectures, laboratory work, assignments, and individual and group projects.
Gain experience collating and interpreting data, and reporting findings clearly and concisely.
Benefit from teaching at our local marine biology field centre.
Undergraduate students in the School of Life Sciences typically attend two or three hours of lectures per week per module, plus two or three laboratory practices per module.

Assessment

Degrees are awarded on the results of your written examinations together with continual assessments of your practical work and coursework.
Contribute towards real-world research projects in your final year of study.

Fees and funding

Home/UK fee

£9,535 per year

International fee

£23,200 per year

Fees will increase for each academic year of study.

Home/UK fees and funding information

International fees and funding information

What's next

Our events are a great way to find out more about studying at Essex. We run a number of Open Days throughout the year which enable you to discover what our campus has to offer. You have the chance to:

tour our campus and accommodation
find out answers to your questions about our courses, student finance, graduate employability, student support and more
meet our students and staff

Check out our Visit Us pages to find out more information about booking onto one of our events. And if the dates aren’t suitable for you, feel free to book a campus tour here.

2025 Open Days (Colchester Campus)

Saturday 16 August 2025 - Colchester Clearing Open Day

Saturday 20 September 2025 - September Open Day

Saturday 8 November 2025 - November Open Day

Find out more

How to apply during Clearing

Once you’ve checked that we have the right course for you, applying couldn’t be simpler. Fill in our quick and easy Clearing application form with as much detail as you can. We’ll then take a look and get back to you with a decision.

Find out more about Clearing

Interviews

We don’t interview all applicants during Clearing, however, we will only make offers for the following courses after a successful interview:

BA Multimedia Journalism
BSc Nursing (Adult)
BSc Nursing (Mental Health)
BA Social Work

The interview allows our academics to find out more about you, and in turn you’ll be able to ask us any questions you might have. Further details will be emailed to you if you are shortlisted for interview.

Apply now

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Set within 200 acres of award-winning parkland - Wivenhoe Park and located two miles from the historic city centre of Colchester – England's oldest recorded development. Our Colchester Campus is also easily reached from London and Stansted Airport in under one hour.

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The University makes every effort to ensure that this information on its programme specification is accurate and up-to-date. Exceptionally it can be necessary to make changes, for example to courses, facilities or fees. Examples of such reasons might include, but are not limited to: strikes, other industrial action, staff illness, severe weather, fire, civil commotion, riot, invasion, terrorist attack or threat of terrorist attack (whether declared or not), natural disaster, restrictions imposed by government or public authorities, epidemic or pandemic disease, failure of public utilities or transport systems or the withdrawal/reduction of funding. Changes to courses may for example consist of variations to the content and method of delivery of programmes, courses and other services, to discontinue programmes, courses and other services and to merge or combine programmes or courses. The University will endeavour to keep such changes to a minimum, and will also keep students informed appropriately by updating our programme specifications. The University would inform and engage with you if your course was to be discontinued, and would provide you with options, where appropriate, in line with our Compensation and Refund Policy.

The full Procedures, Rules and Regulations of the University governing how it operates are set out in the Charter, Statutes and Ordinances and in the University Regulations, Policy and Procedures.