Different living environments, different appearances, etc.

1. Different living environments: loaches have particularly high requirements for the water quality of their living environment. Loaches can only be found in clear, unpolluted mountain streams; loaches can survive in mud fields and ponds. .

2. Different appearance: the loach has a slender body, a long and pointed head, and less obvious barbs on its back; the loach has a rounded head and no barbs on its back.