1, each with its own characteristics. Crab and tiger fish, ray of perciformes? ? A small freshwater carnivorous fish belongs to the genus odontidae of odontidae. Goby is a general term for all goby species in goby family, and each species has its own name, such as "pygmy goby" and "common goby".

2. Different living habits. Crab and tiger fish live at the bottom of rivers and lakes, and there are many aquatic plants, gravel, crevices and sediments. In winter, it lurks deep in the water layer or overwinters under stones, and its main food is shrimp and small fish. The goby has a weak swimming ability and a narrow range of activities. A few species have breeding and migration habits and enter rivers. The goby's diet is very diverse, and the eggs of smaller fish, shrimp, worms and other fish are all goby's food.