The stingy fish (scientific name: Cottus spinulosus) is a freshwater fish of the family Sparidae. Because of its hard bone plate ("stingy head") on its head and its adaptability to cold water environment, it has become a landmark species in the freshwater ecosystem at high latitudes in the northern hemisphere. Mainly distributed in the northern hemisphere high latitudes and temperate mountain cold water streams. The Rocky Mountains and Coast Range streams of the United States (Alaska, Washington, Montana) and Canada (British Columbia, Alberta).

The Songjiang perch is a fish species belonging to the family Scorpaenidae in the order Scorpaeniformes. The front part of the adult fish is flat and flattened, the middle part is nearly cylindrical, and gradually becomes thinner and flattened towards the back; Big head, wide and flat; Wide mouth, end position; The kiss is wide and round, with the maxilla extending below the posterior edge of the eye. China produces along the coasts of the East China Sea, Yellow Sea, and Bohai Sea. It lives in shallow sea, estuaries, fresh water Rivers and Lakes and other waters. Carnivorous fish, planktonic stage, prefer to feed on copepods, brine shrimp larvae, branchiopods, shrimp larvae, etc; The benthic period shifts to feeding on shrimp, oligochaetes, annelids, etc; During the juvenile and adult stages, they feed on shrimp and small fish, and stay up during the day and come out at night.