'Fishnet' in the Bible

He brings up all of them with a fishhook; he drags them up with a fishnet; he gathers them in his dragnet. Therefore, he rejoices and exults.

Therefore he sacrifices to his fishnet and makes offerings to his dragnet, for by them {he makes a good living} and his food [is] rich.

Will he therefore empty his fishnet and continually kill nations without showing mercy?