What is a yellow-winged fish? Echinotus flavipectus (scientific name: Echinotus flavipectus) is a marine fish of Sparidae. Generally, the body length is 200 ~ 300 mm, and the largest individual can reach 3.3 kg. The body is rectangular, flat on the side, narrow on the back, gradually inclined from the starting point of dorsal fin to the snout, with a blunt and round ventral surface and small curvature. The mouth is of medium size, almost horizontal, with the length of the upper and lower jaws almost the same, and the back end of the upper jaw reaches below the front edge of the pupil. The edge of the anterior gill cover is smooth, and the edge of the posterior gill cover has flat blunt spines. The gill box is very short, and its length is about 6 times of the eye diameter.

The body is thin and weak, and the head is covered with scales except the eye septum, the front gill cover and the snout. The spines of dorsal fin and gluteal fin have developed scale sheaths, the base of fin is covered with scales, and the lateral line is completely curved. The dorsal fin spine is strong, the fourth or fifth fin spine is the longest, and the dorsal fin starts slightly in front of the base of the ventral fin. The gluteal fin is opposite to the dorsal fin, and the second fin spine is obviously stronger. The living body is bluish gray and yellow, and there are several gray longitudinal bands along the scales.

A small part of dorsal fin, gluteal fin and caudal fin are gray-black, and most of ventral fin and gluteal fin and caudal fin are yellow. Echinotus flavipectus is a shallow water-heating benthic fish that lives in coastal waters and estuaries. Echinosaurus flavipectus has no long-distance migration habit, but has obvious reproductive migration behavior. About two months before spawning, they move from coastal or domestic salty and fresh water areas to deeper areas with higher salinity. This process takes about two months, and then they return to the coastal areas after spawning. Widely distributed in the Red Sea, Arabian Sea, India, Indonesia, North Korea, South Korea, Japan (Honshu, Shikoku and Kyushu Island), Philippines, Australia and the southeast coastal waters of China. China and Guangdong are widely distributed along the coast.

Efficacy and function of yellow-winged fish 1. The pectoral fin, ventral fin and gluteal fin of wild yellow-winged fish will be bright yellow when the fish is fresh, and the yellow-winged fish caught in the open sea will be bright pink yellow. These fins of cultured yellow-winged fish will be khaki and not so bright because of the water quality in the cultured sea area.

2. As for the fishtail handle, the wild yellow-winged fish has a slender body and a longer fishtail handle than the farmed yellow-winged fish, because it lives in the natural environment and is influenced by tidal changes. The mobility of fish is different in different sea areas. The cultured yellow-winged fish is limited by the cage, with small activity area, little influence by the tide, round body and short tail handle.

3. If the bought yellow-winged fish is killed, it can be seen whether it is wild or farmed. Cultured fish usually have a thick layer of oil in their bellies. The food supply of wild yellow wings is irregular and secure, and there is generally no thick oil.

4. The wild yellow-winged fish tastes delicious and the meat is tough, while the cultured yellow-winged fish tastes sandy and the meat is loose;

There are also vendors in the market who will use cheaper "Xiangtou" as wild yellow-winged fish. "Xiangtou" has an arc-shaped head and pointed yellow wings.