The English name for the pike is Barracuda, or pike or pike, and there are about 26 known species of pike in the world, with a long, narrow body that can be up to 1.8 meters long. Because of its wide mouth and chin, with a long as the wolf's teeth as prominent as the sharp teeth, the local people also called it the sea wolf fish.

The pike's adaptation to salt ranges from 0-38‰, and can survive in seawater, brackish freshwater and freshwater lakes. Pike can normally inhabit and feed in waters with a water temperature of 3-35℃, the optimal water temperature range is 12-25℃, and death occurs when the water temperature is lower than -0.7℃. The pike likes to inhabit in the junction of salt and fresh water, into the estuary and harbor, for one of the harbor fish.