An oceanographer is a scientist who studies oceanology, the branch of science dealing with physical and biological aspects of the oceans.
A biotechnology scientist.
An Oceanographer. Marine Biologist, that sort of thing.
A scientist that studies viruses is called a virologist.
A scientist who studies mollusks is called a teuthologist.
A scientist that studies bears would be called an ursinologist.
oceanology, or marine science
virologist
An aviologist.
Bridgeologist
astronomer
A meteorologist.
biologist