They would be known as an Oceanographer.
marine biologist :)
oceanographer
Marine biologist
marine biologist.
A biologist studies all life forms.
marine biologist
scientist
Biologist specialized in marine life and its surroundings.Someone who studies life underwater, e.g. fish, squid, whales, and etc...A scientist who studies life forms found in the ocean is a marine biologist.
scientist
marine biologist
It is Ecologist
marine biologist