CATDOLL : CATDOLL: What animals belong to the phylum Mollusca?

Abalone discus hinggi

Commonly known as "abalone", it belongs to the phylum Mollusca, class Gastropoda, family Abalone, and is a precious single-valve mollusc. It likes to live in cold and warm subtidal zones, waters with smooth water flow, high transparency, and high salinity. It often attaches its feet to the bottom of algae-covered reefs. It likes to hide during the day and come out at night. It feeds on algae, especially brown algae, and also red algae and green algae. It is mainly distributed in the northern coast of China, North Korea and Japan. The coastal areas of Liaoning and the Miaodao Islands in Shandong are the hometowns of the wrinkled abalone, and the individuals produced in the Yellow Sea are larger. The wrinkled abalone has only three layers of spiral shells, which are flat, wide and ear-shaped, and the shell is up to 130-150 mm long. There are 4-5 small holes in its shell arranged from the right front to the back, which are the channels for excretion and breathing. Abalone can be said to be ugly, with a rough and dull shell, gray-brown or green-brown, and often attached to animals or algae to form a natural protective color. The inside of the shell is bright white and pearly iridescent. Abalone shell is the precious Chinese medicine Cassia. The head of the abalone is located at the front of the body, with a pair of slender tentacles, a pair of eyes on two short fleshy eye stalks, a protruding snout on the ventral side of the head, a mouth at the front of the snout, and a radula in the mouth, which is an organ for feeding. The muscles of the foot are particularly developed, accounting for 40% of the body weight, and are a delicious marine delicacy. There are many tentacles on the edge of the foot, which can be retracted and extended freely, and have a sensory function. When frightened or in danger, the foot will shrink quickly and forcefully and firmly attach to the rock. Someone has tested that an abalone with a shell length of 15 cm has an adsorption force of more than 200 kg. Even if the shell is broken, its foot is still stubbornly fixed on the rock. There are many types of abalone, with about 100 species in the world. The largest red abalone, with a shell length of 300 mm, is produced in California and Mexico in the United States. One abalone can provide a delicious meal for several people. Big abalone and green abalone are also large and precious species. China produces 7 species, mainly wrinkled abalone, variegated abalone, ear abalone, etc. Among them, the production of Abalone discus humphead is the highest, accounting for about 70% of the total production of abalone in my country. Abalone meat has high nutritional value and delicious meat. It is listed as a traditional precious marine treasure and the top of the "eight treasures". Both the meat and the shell can be used as medicine. Abalone can also be made into pearls, called "abalone pearls", which are better than "Southern pearls". Abalone has long been artificially raised and developed into factory production.

squid

Commonly known as "cuttlefish", it belongs to the phylum Mollusca, class Cephalopoda, family Sepiidae. It is widely distributed in tropical and temperate deep seas. In spring and summer, it migrates to shallow seas rich in coastal algae for reproduction. It feeds on crustaceans, fish and other mollusks. Its enemies are large aquatic animals. The squid has a special body shape. Its body is bag-shaped, slightly flattened dorsally and ventrally, symmetrical, and clearly divided into head, neck and trunk. The head is nearly spherical and particularly developed. There is a pair of large eyes with complex structures on both sides. There is a mouth in the center of the front end. There is a pair of powerful horny jaws and radula in the mouth. There are five pairs of radially arranged arms around the mouth (formed by special feet), so it is called "cephalopod". One pair of arms is particularly long, with a tongue-shaped end and multiple rows of suckers on the inside. It is very retractable and is called tentacles, which are the main predatory organs. There is a tentacle capsule at the base. When swimming, the tentacles can be retracted into the capsule to reduce resistance, and they are quickly extended when preying. Behind the head is a short and inconspicuous neck. On the ventral side of the neck is a fleshy trumpet-shaped tube called a funnel (specialized from the foot). It is a channel for excretion, reproduction, ink and water spraying, and a special organ of movement. The funnel mouth can be straight forward or bend backward. Using the reaction force of the water spray, the body can swim forward or backward quickly. The trunk is wide and oval, consisting of the mantle and the internal organs surrounded by it. There are narrow muscular fins on both sides of the body surface to help swimming and balance the body. The skin of the body wall is thin and soft, containing many pigment cells and reflective cells, which can quickly change body color to adapt to the environment. Female cuttlefish will also have colorful nuptial spots during the reproductive season. The outer shell of the cuttlefish has degenerated into a soft and loose calcareous inner shell - cuttlefish bone, which is called sea cuttlebone in traditional Chinese medicine. There is a tube in the rectum of the squid, which expands into an ink sac. The ink contained in it can be discharged into the mantle through the anus. If it encounters an enemy, the ink will be ejected through the funnel, creating a smoke screen that can last up to 10 minutes. Some deep-sea squids also contain luminous substances in their ink, which can confuse the enemy and allow them to hide or escape. Squids are dioecious and fertilized internally. From April to June every year, they migrate from the deep sea to shallow seas where there are many algae for reproduction. Females generally lay 1,000 eggs, which are linked together in grape strings and attached to gorgonians, seaweed or other objects. The incubation period is about one month, and they will directly develop into small squids. Squids first appeared in the Miocene 21 million years ago, and their ancestors were belemnites. There are about 100 existing species, which are widely distributed and have great differences in shape. The smallest species is less than 1 cm long, while the largest giant squid is 20 meters long and weighs 8 tons, which can be called the largest invertebrate. Common cuttlefish in my country include golden cuttlefish, tiger-spotted cuttlefish, pseudo-ordered cuttlefish and Manson's needleless cuttlefish. The latter is found throughout my country's coastal areas, especially along the Zhejiang coast, and is one of my country's four major marine products (large yellow croaker, small yellow croaker, hairtail and cuttlefish). The history of eating cuttlefish is long. People have been eating this mollusk since before the Tang Dynasty. Its meat is delicious, crispy and tasty. Dried products are called "dried cuttlefish" or "borers", the dried male reproductive glands are called "mullet spikes", and the dried female egg-wrapped glands are called "mullet eggs", all of which are seafood delicacies. The eyeballs, ink sacs, and internal organs of cuttlefish can all be used as industrial raw materials.

Tabby baby

Commonly known as "tiger shellfish", it belongs to the phylum Mollusca and the class Gastropoda. It is found in tropical and subtropical seas and likes to live in coral reefs several meters below the low tide line, often hiding in reef caves or under rocks. It is photophobic, moves slowly, and is often nocturnal. It is carnivorous and feeds on foraminifera, sponges, and small crustaceans. It can be found in Taiwan and Hainan Island in my country, and is especially common in the Xisha Islands. The shell is oval. It is about 55-120 mm long and 29-59 mm high. The shell surface is covered with an enamel layer, the back is bulging, the dorsal line is obvious, the front end is sharp, and the top of the back end is concave. The shell surface is extremely smooth, grayish white or light yellow, with dark brown spots of varying sizes, and the color resembles tiger skin, hence the name.

The tiger clams have a unique feature. When they crawl, the mantle stretches outward and turns upward to cover the entire shell. There are many colorful tentacles on it, swaying and drifting, like a chrysanthemum blooming in the sea. At the same time, the mantle constantly secretes enamel and applies it to the shell. No wonder it is always dazzling. Tiger clams are dioecious, and they mate in spring and summer every year. The eggs are laid in coral caves, empty shells or other hidden places. The eggs are sticky and covered with egg sacs. After laying eggs, the female lies on them to protect the eggs from enemies until the eggs hatch. The meat of tiger clams is edible, and the shells are precious ornaments. More than 40 species have been found along the coast of my country, among which the most common ones are cargo shells, slow shells, tiger-striped treasures, and egg yolk treasure insects. In ancient times, people used treasure shells as currency. my country began to use it before the Yin and Zhou dynasties until it was abolished in the Qin Dynasty, and remote Yunnan was still using it until the early Qing Dynasty.

Hello, Mollusca English name: Mollusca (Latin) Definition: Commonly known as "shellfishes". A phylum of invertebrates. Soft body, usually with shell, no body segments, with fleshy feet or arms. Applied disciplines: Fisheries (first-level discipline); Basic Fisheries Science (second-level discipline)

According to the different morphological structures of mollusks, they can be mainly divided into the following five classes.

1. Bineurines are bilaterally symmetrical. The head is not obvious. There are often eight shells, arranged in a shingle-like manner on the back. The feet are block-shaped. Such as chitons.

2. Gastropods are asymmetrical. The head is obvious. The shell is spiral-shaped. The legs are often located on the ventral side. Such as field snails and snails.

3. The class Scaphopoda is bilaterally symmetrical. The head is not obvious. The foot is cylindrical. The shell is a horn-shaped tube with two ends open. Such as the horn shell.

4. Bilateria are bilaterally symmetrical. They have no head. Their feet are axe-shaped. They have two shells. Such as river clams and oysters.

5. Cephalopods are bilaterally symmetrical. The body is divided into two parts: the head and the thorax (internal organs). One part of the foot is a strip-shaped bowl, and the other part is a funnel-shaped body. The shell is an outer shell, or an inner shell, or none. Such as squid, abalone, etc.