Ichthyology is the study of fish. So an ichthyologist is someone who studies fish.
This answer is a entomologistA scientist who only studies fish is called an ichthyologist.
the name of the person who studies bugs /insects are called entomologist
A person who studies bees is called an apiologist.
A person who studies audiology would be called an audiologist.
Someone who studies the planet Mars is called an areologist.
I think it is called a zoologist.
i think its a oceanographer
I believe they are called architects