The whole body is yellow and the striped tail is black. What kind of fish is this?

Judging from your description, the fish you said is called snapper. Rock snapper is a kind of fish that lives in temperate or tropical waters. It can be eaten or raised as an ornamental fish. It has a wide range of branches, and it is also found in China. Rock snapper is usually called "black mask Weng" or pattern snapper, and it is only 30 cm long. There are seven black horizontal bands on the body of snapper, which will become clear as the male grows up.

Rock snapper is a carnivore, feeding on small shellfish and crustaceans.