I guess you would need to do a degree in marine biology at university. For this I would recommend A-Level biology and at least one other science at A-Level, e.g. chemistry. Maths might also be quite useful. The exact requirements will change depending on the university though.
Hi Bendavies, there are some universities in UK, who offer Marine Biology degree at graduate level, along with other related subjects, like oceanography, Fresh water Biology, ecology, Zoology etc. It will be all your choice to pick right one. They usually ask for strong Biological background. At unversity level, you can then conduct research project related to marine Biology, to become a “Marine Biology scientist.” That’s it.
I have a friend in Edingurgh who is a Marine Biologist. I was under the impression that not many places offer the course and it is quite competitive to get into. I think the others are right in terms of the choice of A-levels – Geography might be another useful one. I know my friend studied at Heriot Watt University in Edinburgh so you could certainly check out their website. I think it is pretty popular, possibly because many people think it is quite glamorous and involves lots of diving in beautiful places! My friend does really like being a Marine Biologist I think but it is not glamorous…..he mostly studies worms and dives off the coast of Scotland in the North Sea !!