Traditional Culture Encyclopedia - Hotel accommodation - Why is there a snakehead in the fish tank of every supermarket (hotel)? The kind that sucks on the wall. What kind of fish is this?

Why is there a snakehead in the fish tank of every supermarket (hotel)? The kind that sucks on the wall. What kind of fish is this?

Sweeper/sweeper

A fish, native to South America, is named after eating all kinds of underwater garbage and is often mixed with all kinds of fish.

encyclopedia/view/58753 . htm # 1