Do fish porpoise when they are breeding?

No, fish do not "porpoise" when they are breeding. Porpoising is a specific type of swimming behavior in which an animal repeatedly jumps out of the water and back in. It is associated with several marine mammals, such as dolphins and porpoises, but it is not an activity that is observed in fish.

Fish reproductive behavior varies greatly among different species. Some fish species exhibit unique reproductive behaviors and rituals during breeding, such as building nests, engaging in courtship displays, or forming temporary mating pairs. However, porpoising is not typically associated with fish reproduction.