What do you call a scientist who study the life forms found in the ocean?
That would be a marine biologist.
There are many various factors a Scientist can study in the ocean. A Marine Biologist would study marine life, how marine life acts, etc. When your studying the ocean, it's like your study a whole nother earth. Factors like temperture, reactions, sound travel and ancient history are also popular for scientific research of the ocean.
The general study of the ocean (its form, environment, and living creatures) is done by an oceanographer, often called "marine scientist." The specific study of living things in the ocean comes under the purview of a "marine biologist" and there are various specific studies of flora and fauna. An "oceanographer" or "marine scientist" studies the ocean (its form and the life within it). The science is called oceanography, oceanology, or marine science.
Conrad Gessner, an ocean scientist, was out looking for whale fragments to study. Unexpectedly, he found a orca on the way. Many people believe that they are whales or dolphins, but the fact is they are neither. They are their own species! A male could get up to 19 to 22 Ft. a female can get up to 16 to 19 Ft.