The distinction is between a left flounder and a right flounder, the one with both eyes growing on the left side is the left mouth fish, which is biologically classified as a flounder. And the one with the eyes growing on the right side is called flounder.

Partial mouth fish, or flounder, is the general term for fish in the order Platyhelminthes, which includes fish in the families Turbot, Flounder, Plaice, Sole, and Tongue Sole.

The parrotfish has a flattened body, and as it grows its eyes gradually move to the side of its head, lying flat on the seafloor. The words "partial mouth" and "bimanual" describe the most prominent features of their bodies.

There are many different kinds of flounder, but in Yushan, the best and most famous are the high eye flounder, stone flounder, and tooth flounder.

Crowfish Flounder

Raw material aliases: toothfish, partial mouth, butterflyfish, ya flounder, toothfish, left mouth, flounder, crowfish, earthfish

Flounder is a class of bony fishes, Flounder family, which is a class of flounder.

The body is laterally compressed and asymmetrical, with both eyes on the left side. The mouth is anteriorly positioned, with a protruding lower jaw. The margins of the anterior gill cover bones are free. The skin is dark gray or patchy on the side with the eye, and white on the side without the eye.

The turbot has many species and is widely distributed in tropical or temperate oceans. China's coastal areas are also much production. Mainly for fresh food or canned and salted dry products.