[ noun ] a zoologist who studies fishes <noun.person>
Ichthyologist \Ich`thy*ol"o*gist\, n. [Cf. F. ichthyologiste.] One versed in, or who studies, ichthyology.
The couple rented out a house to a biologist and an ichthyologist, who said their farmland was just right for raising trout, a fish that likes cool water year-round.