aquaticist
There is no specific name for a person who studies squids. A marine biologists is someone who studies ocean life.
The name for someone who studies caves is a speleologist or a spelunker.
A psychologist is the proper name for someone who studies the mind.
Pathologist
An Archaeologist
The scientific name for the water strider is Gerridae.
The scientific name of water boatman is "Corixidae."
The scientific name for a water boatman is a Corixa.
A water moccasin snake's scientific name is Agkistrodon piscivorus.
There is no special name for someone who studies Hebrew.
Someone who studies planetary systems is called a planetary scientist
the scientific name of the water hyacinth is O2HCl