Fish Biology Terminology

noun a person who studies fish

• The renowned ichthyologist conducted extensive research on deep-sea fish species.
• My friend is studying to become an ichthyologist and is obsessed with all things related to fish.
• I heard that dude is a total fish nerd, like a real ichthyologist or something.
• As an ichthyologist of human behavior, she delved deep into the complexities of the mind.

noun a member of the Actinopterygii, a subclass of bony fishes characterized by the presence of ray-finned fins

• The actinopteran fish is known for its ray-finned fins.
• I saw a cool actinopteran fish at the aquarium with really fancy fins.
• Check out that actinopteran fish, it's got some sick fins!
• Her movements were as graceful as an actinopteran fish swimming through water.