Frequently caught "Animal Crossing" fish (4)

I believe the answer is:

carp

(Other definitions for carp that I've seen before include "Swimmer" , "Nagging fish?" , "Keep complaining" , "Raise petty objections about goldfish" , "Raise trivial objections" .)

I've seen this clue in the Universal.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.