This is called scallop.

Introduction:

Scallops are bivalve molluscs, belonging to the order Oysteridae, and live attached to shallow sea rocks or sandy sea bottoms. There are many varieties of scallops, with about 400 species. It is one of the important marine fishery resources around the world. The shell, meat and nacre of scallops have extremely high utilization value. Many scallops are eaten as a delicacy. Scallops with bright radial patterns are very popular among collectors. Scallops, also known as sea scallops, have delicious meat and rich nutrition. After their adductor muscles are dried, they become "scallops" and are listed as one of the Eight Delicacies.

Appearance characteristics:

Marine bivalve mollusks of the scallop family (Pectinidae, especially the genus Pecten). There are about 50 genera and subgenus and more than 400 species in this family. Distributed worldwide, found in intertidal to deep sea areas. The shell is fan-shaped, but the butterfly hinge line is straight, and there are wing-like protrusions at both ends of the butterfly hinge. The size is approximately 2.5 to 15 centimeters (1 to 6 inches) or more. Shell smooth or ribbed. The ribs are smooth, scaly or knob-like, and are bright red, purple, orange, yellow to white in color. The lower shell is lighter in color and smoother. There is a large adductor muscle. There are eyes and short tentacles on the edge of the mantle. The tentacles can feel changes in water quality. When the shell is open, it is like a hanging curtain between the two shells. Scallops are commonly found in sand or fine gravel in clear seawater. Feed on tiny organisms. Cilia and mucus collect food particles and move them into the mouth. Able to swim, the double shells flap intermittently, ejecting water and using its reaction force to propel itself forward. The eggs and sperm are released into the water for fertilization. The hatched larvae swim freely, and then the larvae are fixed on the bottom of the water to develop, and some can crawl. After the larvae form, byssus glands are used to fix on other objects. Some stay attached for life, and some swim freely again midway.

Reference materials

Baidu Encyclopedia: /item/E68987E8B49D/1047097?fr=aladdin