Answer:
The correct answer would be - marine biologists.
Step-by-step explanation:
A marine biologist is a scientist or the researchers that work or research over the different types of organisms that live in the ocean or the saline water.
Ocean has many different organisms including in marine zoology and marine botany. A marine biologist that knows what organism will be better for salt or saline water aquarium.
Thus, the correct answer is - marine biologist.