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 there will be 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 that are 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 and identifying coral reef conservation strategies in the Caribbean and Indonesia.

During the field trip to Wakatobi Marine National Park in Indonesia, our students are able to participate in underwater lectures.

Were ranked 54th (14th in UK) for promoting the United Nations Sustainable Development Goal for climate action (Times Higher Education Impact Rankings 2024).

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.