Marginal mouthfish has a flattened body, with both eyes gradually moving to the side of the head as it grows, lying flat on the sea floor;

Minor mouthfish has a long, laterally flattened body, with a bulging dorsal body and a flat abdomen. The head is tapered. Snout bluntly rounded. Mouth inferior, transverse;

Opisthobranchus laterally compressed, asymmetrical, both eyes on the left side; mouth anterior, with protruding mandibles.

The parrotfish, or flounder, hi-eye flounder, is the general name for the fish of the order Platyhelminthes in the order Scleractinia, which includes the fishes of the families Tetraodontidae, Maximidae, Platyhelminthes, Platyhelminthes, Soleidae, and Tongue Soleidae. The partial mouth fish has a flattened body, and as it grows the two eyes gradually move to the side of the head and lie flat on the sea floor.

The smallmouth, also known as the pole-side flat pharyngeal toothfish, has a long, laterally flattened body with a bulging dorsum and a flat abdomen. The head is tapered. The muzzle is bluntly rounded. The mouth is inferior and transverse; the lower jaw has a sharply developed angular anterior margin. Upper lip broad and thick, lower lip thin and narrow. Postlabial sulcus terminating at corner of mouth. Whiskers absent. Body naked and scale-free, with only anal scales; scales disappeared or only traces at shoulder girdle; lateral line scales inconspicuous. Dorsal fin spines strong, y serrate, with dorsal and ventral fins starting at opposite points; anal fin positioned posteriorly; caudal peduncle short. Body dorsally yellowish brown or greenish brown, abdomen light yellow or grayish white. Ventral and anal fins light yellow, dorsal and caudal fins greenish gray.

The opilio is a member of the order Scleractinia, family Plaiceidae, a group of flounders. The body of the opium fish is laterally compressed, asymmetrical, both eyes are on the left side; the mouth is anteriorly positioned, with a protruding lower jaw; the edges of the anterior gill cover bones are free; the skin on the side with the eyes is dark gray or patchy, and the skin on the side without the eyes is white. Opium fish can be mainly used as fresh food or made into canned and salted dried products, the fish liver can be extracted from the production of cod liver oil.