How do shellfish reproduce?

Shell is a mollusk living by the water. The shell is delicious and nutritious. Most kinds of shells are edible. It is a common dish. So, how do shellfish reproduce?

First, how do shellfish reproduce?

The mode of reproduction of shellfish varies from species to species, which can be divided into hermaphroditism and androgyny. The species of hermaphroditism include polyplate, the vast majority of probranchial subclass and lamellibranchial class, cephalopod and so on, some of them are fertilized by mating, and some of the reproductive products are fertilized in water; the species of hermaphroditism include non-plate class, posterior Gill subclass, lung snail subclass and a few probranchial and lamellibranchial classes, most of which are fertilized by mating.

What are the common edible shellfish?

1. Raw oysters

Belong to bivalve molluscs, the two shells are different in shape, the surface is rough, dark gray; the middle of the upper shell is raised, the lower shell is attached to other objects, larger than the upper shell, very flat, the edge is relatively smooth; the inside of the upper and lower shells are white and smooth. Distributed in the coastal waters of temperate and tropical oceans.

2. Fragrant snail

Belongs to gastropod molluscs, the shell edge outline is slightly rhombic, the shell is large and thick, and relatively hard, the shell height is about 10cm, the thread has 6 layers, the shell color is flesh color, the surface is soil brown, flannel-like shell skin, the shell mouth is very large, the interior is apricot red, pearl luster. It is unique to China, produced in the Yellow Sea and Bohai Sea, mainly distributed in Guangdong, Fujian, Liaoning, Shandong and other regions.

3. Clam

Belong to bivalve molluscs, two shells, hard and thick, slightly tetragonal, the left and right shells are equal, the top of the shell is slightly bent forward, it is located in the middle of the back edge of the shell slightly to the front end, the middle of the shell surface expands, and the front, back and near the ventral edge contract sharply, so that the front and back edges more or less form a rib shape, a small lunar surface and a small lunar surface. The growth pattern on the shell surface is obviously thick, forming an uneven concentric ring. The shell has a shell, the top is white or lavender, the ventral side is yellowish brown, and the ventral edge often has a very narrow black band. The inside of the shell is gray. The hinge part is wide. Living in shallow mud and sandy beaches, it is distributed along the coast of China.

4. Scallop

Any of various marine bivalve mollusks of the genus scallop having a fan-shaped shell but a straight butterfly hinge with a winglike protruding at both ends and a smooth shell or radiant rib. Ribs smooth, scaly or protruding, bright red, purple, orange, yellow to white. The lower shell color is lighter and smoother. There's a big adductor muscle. Worldwide distribution, found in the intertidal zone to the deep sea.

5. Oysters

Is a mollusk, there are two shells, the surface of the shell is uneven, the shape of the shell is irregular, the size and thickness vary from species to species, the left shell or lower shell is large and concave, attached to the rock or slate, the right shell or upper shell is small and flat, covered like a cover.

6. Baibei

The shell is slightly oval in shape, strong in texture, raised in the center of the shell back, thick and low on both sides, and suddenly expanded on both sides at the rear of the shell, forming a tumor-like protuberance, the shell surface is smooth, grayish yellow or yellow-white, the back is blue-gray, with white fine lines, most with orange-red fine lines, some back grayish green or blue-gray, a few have 3 inconspicuous dark bands, and brown spots.

7. Sea clam

It belongs to marine bivalve shellfish, the shell is slightly triangular, the shell length is usually 7cm to 9cm, the top of the shell is slightly in front of the center, the ventral edge is round, the body height is 4 inch 5 of body length, and the body width is 1 inch 2 of body length. The shell is thick, the shell surface is smooth, the growth vein is obvious, the top of the shell is lavender, and the rest is beige or grayish white.