Question 2: What kinds of shells are there? Shell information: Almost all mollusks have shells-shells. Shellfish are divided into five classes, namely Gastropoda, Bivalves, Bipods, Polypods and Cephalopods. Each class is divided into several different nationalities. Gastropoda shells: most Gastropoda shells have small water pipes at the back of the shell mouth and water pipes at the front of the shell mouth. There may be wrinkles on the screw shaft and convex teeth on the outer lip. Observing the shell mouth surface, the shapes are hat-shaped, ear-shaped, gyro-shaped, screw-shaped, pear-shaped, spindle-shaped, pipa-shaped and stick-shaped. Bivalves: this kind of shell consists of two layers of shells, left and right, connected by a ligament; When the two shells are closed, ligaments can be seen from the bottom of the shells. The shapes are disc-shaped, fan-shaped, boat-shaped and paddle-shaped, and a few are heart-shaped and irregular. Shells of other classes: In terms of species and morphology, Polypoda, Bipoda and Cephalopoda are far less abundant than Gastropoda and Bivalves. Bipods are ivory, and rare cephalopod shells are almost the same in shape and size; Polyplacophora's shell plate is decorated. Growth of shells: Immature shells are very similar to mature shells, but they are different in size. Bivalves grow along the edges of two shells, and the growth direction of the shells remains unchanged when they grow up. Gastropods coil themselves along the mouth of the spiral tube. Composition of shells: Calcium carbonate is the most basic substance that constitutes shells, and the other component is protein, and protein will be included in the cover of gastropods. The secretion of this ingredient layer by layer makes the shells harder and harder, and some will also produce the luster of pearls. The hard shell grows from the outer edge and gradually thickens with the growth. Shellfish also secrete scales, tumors, spines and ribs at the outer edge of growth. Because of the periodicity and continuity of growth, shells present beautiful and colorful patterns. Shell collection: clean the meat, residue and shell attachments of shellfish to ensure that the shells are completely dry, and then store them in a dark and closed place. Finally, it is labeled and classified to facilitate collection and retrieval. Shellfish habitat: molluscs have been able to adapt to different living environments, from rocks washed by seawater day and night to the dark seabed, there are their special molluscs. Tides affect the characteristics and distribution of mollusks growing on the seashore, and sufficient sunshine can provide sufficient food. Molluscs are best suited to live in tropical areas, and there are an amazing number of seashells. Habitat protection: human beings should try not to destroy the habitat of living things. Under almost every rock and coral reef, there is a community where animals and plants live. Once destroyed, it will bring them disaster. As long as one coral is cut from the coral reef, other coral reefs will die one after another. If a beach is constantly searched by seashell collectors, the natural habitat of this creature will be gradually destroyed, so please respect the living space of these unguarded lower animals. All kinds of shells and snails have strange shapes and mottled colors. Among them, there are tiger-spotted shellfish, white jade shellfish, luminous shellfish, five-claw snail, pig mother snail, pearl oyster, chaste snail, tangguan snail, heptacodium snail, pig ear shell, horseshoe snail that can be used as ashtray, and bighorn snail that fishermen use as speakers. , are lovely natural handicrafts, and all kinds of painted screens, utensils and furnishings made of smooth and shiny shells are colorful and natural. Shells are also made into various practical handicrafts, such as wine sets, ornaments, pendants, necklaces, brooches, etc., which are exquisite and luxurious, and are no less than jade. Shell carving is also very distinctive. Hainan shell carving technology has reached a high level in the Ming Dynasty, and gradually combined with ancient coconut carving technology to form a unique artistic style. Most refined Hainan shell carvings are made of coconut carvings or are based on coconut carvings. The bright shell carving is in sharp contrast with the simple coconut carving. It is striking that a bivalve shell has two petals, which are generally oval, and the side of the shell is flat, and the size of the shell is very different. Most bivalves lurk in the sand, but some of them can swim freely and belong to filter-feeding animals, which can filter tiny plankton in the water. This kind of shell is quite common in Hong Kong waters and most Indo-Pacific regions. Baby is colorful, beautifully shaped, smooth and bright. Shells vary in size, from oval to oval, and the shell sides are spiral and overlap inward. At present, about 190 species are distributed in tropical and subtropical waters, while 19 species are found in the waters near Mirs Bay and Zhouguo. The baby is active at night and foraging, and mainly eats tiny marine organisms such as corals and sponges. In ancient times, Beibei was a currency in circulation. Conus shells have spots, patterns or patterns, and the colors are gorgeous. The colorful patterns hidden in its mantle add features to the beautiful appearance of shells. The spiral body is inverted biconical or oval, which is extremely strong. Snail ... >>
Question 3: What kinds of shellfish are there? Such as conch, conch, snail, pearl oyster, Xiufeng clam and so on.
1. Shells generally refer to the shells of mollusks. It has a special gland cell, whose secretion can form calcification and protect the soft part of the body, called the shell.
2. Shells can be divided into five classes: Gastropoda (including snails, snails, snails), Shopoda (parrots, octopus), Polypoda, Crapoda (ivory) and Bivalves (two kinds of shells).
3. Pearl is an ancient organic gem, which is produced in mollusks such as Pinctada and Pinctada. The calcium carbonate-containing mineral (aragonite) beads produced by endocrine function consist of a large number of tiny aragonite crystals.
Question 4: What kinds of shells are there? What kinds of good seafood are there? 1. Fish (live) Pseudosciaena crocea, small-billed fish, Duobao fish, sea snakehead, young lady fish, sea eel, sea catfish, sea hare, time-honored fish, cobbler fish, sarcophagus fish, American red mussel, live abalone, live sea cucumber, live sea sausage and live turtle. 2. Fish (chilled), sand fish, opium, sea eel, Asian salmon with a small mouth sticking to yellow croaker, yellow croaker, Ankang fish pulling fish Cargill fish floating in the sea, octagonal fish sardine red-headed fish, bighead carp with pointed fish, swordfish with fish noodles, snakehead throwing barracuda, carp red-headed swordfish with miscellaneous fish, osmanthus fish with big head and nine rabbits with chubby fish heads, tuna octopus island fish, Le Tong octopus mullet 3. Shellfish (live) Xiayi shellfish. Li Hong Luo Hong vermicelli Bao Zi Wang big conch little seafood Korean snail abalone bird shell navel snail swan egg mango scallop butterfly scallop Baihua Miss Beibei Tiger Scallop Hong Bei longan scallop glass scallop hairy fairy clam shell Hong Bei Arctic scallop elephant pull Dan Haihong Mao Haihong small clam pen little seafood villain fresh horseshoe scallop black cow eye clam with red baby small conch wash snail spicy wave snail tip snail lop snail sea rabbit snail steel snail mussel white clam conch snail fresh seaweed asparagus deer foot dish seahorse kelp slice seaweed kelp buckle 4. Shrimp and lobster larvae knife new shrimp skin shrimp green shrimp sea shrimp Lugu shrimp bamboo shrimp peach blossom shrimp Xiaohe shrimp red shrimp 5. Meat (refrigerated) bird shell meat big clam meat fresh shellfish Ding scallop meat sand fresh meat Monopterus albus meat sea intestine hairy clam meat especially fresh fish. Fish chop suey fresh fish belly herring roe knife fish roe sand fish brain thorn fish head thorn fish skin fresh fish belly fresh fish scorpion mouth kung fu dish 6. Iced fresh fish (water hair) water hair ginseng shrimp sea dog whip fish tendon fish intestine fish white fish belly sand fish Piling fish Pisha fish throat silkworm chrysalis male silkworm goose crab yellow red fish braised.
Question 5: How many kinds of shells do you know? Natural shells include seawater shell, fresh water shell, yellow disc shell, shell, fresh water cotton shell, shell, hemp shell and so on. Shells can be used as jewelry and daily necessities.
Types of shells: tiger shell, white jade shell, luminous shell, five-claw snail, sow snail, pearl shell, chaste snail, Tangguan snail, heptapod shell, pig ear shell, horseshoe snail, bighorn snail, precious snail, phoenix snail, conch, cap snail, conch, Tangguan snail, jade snail, octopus and quail snail. Chrysanthemum clam, sunshine cherry clam, Pacific fox clam, angel wing seagull clam, Xiufeng clam, oil painting sea fan clam, solid color sea chrysanthemum clam, safflower snail, yellow snail, lamarckian snail, etc. What kind of shell is good depends on who can judge a shell and how different it is from the neighboring species, so that it can be judged as an independent new species. Therefore, there is no exact number of mollusks. Of course, although the strict biological classification is inconclusive, there are still some estimated data of different mollusks. General university textbooks believe that there are 50,000 to 200,000 species of mollusks. Adopt different classifications.
Question 6: How many kinds of shellfish are there in the world ● There are 65,438+200,000 kinds of shellfish in the world, which is the second largest species in nature after insects ● More than 2,000 kinds of shellfish live in the South China Sea, adding rich colors to Hainan's marine culture ● It is not enough to know shellfish only from the table. When I first arrive in Hainan, I often have a delicious winter melon and conch soup. I stayed on the island for a long time before I knew that this soup was called the first soup in Hainan. If you are tired and tired after accumulating food, cook a pot of this soup and feel much more comfortable immediately after eating it. Many people know this marine life-shellfish from the dining table. However, it is too superficial to know shellfish only from the table. Shellfish is an extremely valuable resource endowed by nature. There are about1.20 thousand species of shellfish in the world, and there are traces of shellfish everywhere in rivers, streams, lakes and oceans. It is the second largest species in nature after insects. Unique shapes, pleasing colors and exquisite patterns show the wonderful gift of nature, which is amazing. In the long history, shellfish have reflected the evolution and process of human society with its unique charm. Types of Shellfish Shellfish in the world can be roughly divided into terrestrial and aquatic species, of which aquatic marine shellfish account for more than 80% of the total. Marine shellfish is essentially a mollusk, which is characterized by a soft and unsegmented body and consists of five parts: head, feet, viscera, mantle and shell. According to the characteristics and structure of their shells, shellfish can be divided into five categories. Gastropoda: including snails, conches and corn snails, which are spirally wound; Bivalves: there are clams, oysters and scallops. They are generally composed of two shells, petal-shaped; Cephalopods: including squid, nautilus and octopus; Polyplacophora: There are as many as eight shells of this kind, forming a strange shape; Digging foot: the shell top is forward, and the membrane surface is curved, showing a shallow hat shape. Among the five kinds of shellfish, gastropods and bivalves are the most, accounting for more than 80-90% of the total shellfish. The structure of a typical shell has three layers. The outer layer is a qualitative layer called chitin, which is a hard protein. The thicker intermediate layer is called prismatic layer or shell; The inner layer is leaflike aragonite structure, which is very glorious and called nacre. The outer layer and the middle layer are secreted by the rear edge of the outer membrane, and the inner layer is secreted by the whole surface of the outer membrane. Some shells have no three-layer structure, such as Gracilaria shell and squid. The main component of shells is calcium carbonate, accounting for 95% of the total components. Other components include inorganic substances such as magnesium, iron, calcium phosphate, calcium sulfate and silicate, and a small amount of organic substances such as shellfish elements. In Chinese, there are many names of shellfish, and the most commonly used ones are shells, conchs, oysters and clams. Others are called tortoise, abalone, dragonfly, octopus, cuttlefish, manatee, mussel, snail, slug, worm, slug, scorpion, cuttlefish, snail and so on. In terms of shape, there are more than 65,438+10,000 species of shellfish, some of which are shaped like hats or hats, some like gyroscopes, cones, pagodas, and some like disks or spheres. Shellfish of different shapes vary greatly in size. Snails are as small as 0.03 mm long, the largest shell length is 1.8 m, and the weight is about 500 kg. The color of shellfish includes almost all natural colors, and its markings are even more amazing. Shellfish in Hainan Hainan Island has a wide variety of marine environment, with excellent water quality, stable salinity and moderate water temperature, which provides good living conditions for all kinds of mollusks to inhabit and multiply, and forms rich and diverse shellfish resources unique to Hainan. According to incomplete statistics, there are nearly 2000 species of marine shellfish in Hainan, some of which are unique. Among them are abalone, horseshoe snail, mussel, blood clam, clam, scallop, scallop, clam and so on. Medicinal materials include abalone shell, snail shell and meat, doll shell, red snail shell and meat, litchi snail shell, mud clam shell, mussel shell, oyster shell, clam shell and meat. Pinctada martensii, Pinctada Hepu (commonly known as black butterfly shell) and Pinctada maxima (commonly known as white butterfly shell) are the main shellfish for producing seawater pearls. Among them, Pinctada maxima is the largest species, with a shell length of more than 30 cm, solid and thick shell, gray-yellow radial ribs on the shell surface, and rich silvery white pearl layer in the shell. Often inhabiting the sea area with a water depth of about 20 meters, it is a unique species in Hainan Island. There are pearls and shells of mother-of-pearl, luminous snail shells, nautilus, tiger-spotted baby, river snail, crown snail, hedge snail, ... & gt
Question 7: How many kinds of shells are there in the world? There are about 1 1 10,000 species of shells in the world, of which about 30,000 species live on land, 50,000 species live in fresh water such as ditches, mountains and lakes, and the rest live in the ocean. According to the five contours of mollusks, shells can be divided into gastropods, bivalves, bipeds, polypods and cephalopods.
Question 8: What kinds of shells are there in China? There are about1.2000 species. Shellfish are found everywhere in rivers, streams, lakes and oceans. It is the second largest species in nature after insects. Unique shapes, pleasing colors and exquisite patterns show the wonderful gift of nature, which is amazing.
Shellfish in Hainan Hainan Island has a wide variety of marine environment, with excellent water quality, stable salinity and moderate water temperature, which provides good living conditions for all kinds of mollusks to inhabit and multiply, and forms rich and diverse shellfish resources unique to Hainan. According to incomplete statistics, there are nearly 2000 species of marine shellfish in Hainan, some of which are unique. Among them are abalone, horseshoe snail, mussel, blood clam, clam, scallop, scallop, clam and so on. Medicinal materials include abalone shell, snail shell and meat, doll shell, red snail shell and meat, litchi snail shell, mud clam shell, mussel shell, oyster shell, clam shell and meat. Pinctada martensii, Pinctada Hepu (commonly known as black butterfly shell) and Pinctada maxima (commonly known as white butterfly shell) are the main shellfish for producing seawater pearls. Among them, Pinctada maxima is the largest species, with a shell length of more than 30 cm, solid and thick shell, gray-yellow radial ribs on the shell surface, and rich silvery white pearl layer in the shell. Often inhabiting the sea area with a water depth of about 20 meters, it is a unique species in Hainan Island. A variety of shells and shells, such as pearl shell, luminous snail shell, nautilus, tiger shell, river snail, crown snail, hedge snail, spotted snail, conus, etc., can be used to make decorations and handicraft shell carvings.
Question 9: How many kinds of shell ornaments are there? I think you are talking about mollusks with exoskeletons (shells). Regarding the classification of biology, if we stay at the level of popular science, we will feel that it is a very rigorous and orderly system. Phylum, family and species, each creature can find its own unique position ... Actually, if you enter the level of biological taxonomy, you will find that this is a chaotic world that is difficult to sort out. Don't say how many kinds, even how many sessions are inconclusive. Initially, Linnaeus divided organisms into animal stages and plant stages according to whether they could move autonomously. Now popular science books still say so, but there is almost no such classification in college biology textbooks. Now different universities use different textbooks and adopt different classification systems, including three stages and four stages. It depends on who counts or judges. There has never been a standard to judge whether a shell is different from its neighboring species as an independent new species. Therefore, there is no exact number of mollusks. Of course, although the strict biological classification is inconclusive, there are still some estimated data of different mollusks. General university textbooks think that there are 50,000 to 200,000 mollusks.
Question 10: How many kinds of shells are there? The number, shape and structure of shells vary greatly, and some types are 1 spiral shells (such as snails, snails and abalone); Some species have two petal-shaped shells (such as mussels and cockroaches); Some species have eight plate-like shells arranged in tiles (such as stone turtles); Some kinds of 1 shells are wrapped in the body (such as squid, squid); Some kinds of shells even completely degenerate (such as ship maggots). The main components of shells are 95% calcium carbonate and a small amount of shellfish. Generally can be divided into three layers. The outermost layer is dark brown cuticle (shell skin), which is thin and transparent and has the function of preventing carbonic acid erosion, and is composed of chitin secreted by the edge of the mantle; The middle layer is prismatic layer (crust), which is thick and consists of prismatic calcite secreted by the mantle edge. The outer layer and the middle layer can enlarge the area of the shell without increasing the thickness. The inner layer is the nacre (bottom layer), which is composed of phyllodes secreted by the whole surface of the mantle. It has a beautiful luster and can be thickened with the growth of the body. The main chemical composition of calcite and aragonite is CaCO3.