Shell information: Almost all mollusks have shells - shells. Shellfish*** are divided into five major groups, the Gastropoda, Bivalvia, Digitata, Polyplata, and Cephalopoda. Each group is subdivided into several distinct groups. Gastropoda Shells: Most gastropod shells have small posterior plumbing grooves at the back of the shell opening and plumbing grooves at the front of the shell opening. There may be pleated folds on the spiracle axis and convex teeth on the outer lip. The oral surface of the shell is observed to be in the shape of a hat, auricular, turbinate, screw, pear, fusiform, luteal, and clavate. Bivalve shells: these shells are composed of two shells, the left and right shells are connected by a ligament; the ligament can be seen from the bottom of the shell when the two shells are closed. The shape is disk-shaped, fan-shaped, boat-shaped, paddle-shaped, a few are heart-shaped and irregularly shaped. Shells of other phyla: the shells of Polyplatyhelminthes, Digitopoda and Cephalopoda are far less abundant than those of Gastropoda and Bivalvia, no matter in the variations of species or morphology. All digitigrade shells are ivory, and the rare cephalopods are almost uniform in shape and size; the shell plates of polyplates are ornamented. Shell growth: immature shells are very similar to mature shells, except for their size. Bivalves grow along the edges of both shells, and the direction of growth does not change as the shell grows. Gastropods grow in a self-coiling fashion along the mouth of the shell of the spiral tube. Components of the shell: Calcium carbonate is the most basic substance that makes up the shell. Another component is shell protein, which will be found in the mouth cap of gastropods. This is secreted in layers, making the shell harder and harder, and in some cases producing a pearly luster. The hard shells increase in size from the outer edge and thicken as they grow. Shellfish also secrete scales, tumors, spines, and ribs on the growing outer edge. Because of the periodicity and continuity of growth, shells display beautiful colored patterns. Collecting Shells: Clean the shellfish of flesh, debris, and shell appendages, make sure the shells are completely dry, and store them in a light-blocked, airtight place. The final step is to label and sort the shells into categories to facilitate collection and retrieval. Shellfish Habitat: Mollusks have adapted to a variety of habitats, from rocky outcrops where the sea washes over them day and night, to the murky depths of the ocean floor, all of which have their own specialized mollusc fauna. Tides influence the characteristics and distribution of mollusks growing on the seashore, and abundant sunlight provides a rich diet. The variety of sea shells in the tropics, where mollusks are best suited to inhabit, is breathtaking. Protecting the habitat: Humans should try not to destroy the habitat of living things as much as possible. Underneath almost every rock and coral reef is a community of plants and animals that would be devastated if it were destroyed. If one piece of coral is cut from a reef, the rest of the reef dies. If a beach is constantly being searched by sea shell collectors, the natural habitat of the creatures will be gradually destroyed, so please respect the living space of these lowly and defenseless animals. There is a wide variety of shells and conch shells in strange shapes and colors. Among them, tiger shells, white jade shells, luminous shells, five-clawed conch, pig mother conch, pearl shells, chaste conch, Tang Guan conch, seven-horned shells, pig's ear shells, as well as ashtrays can be used as horseshoe conch, fishermen role of the horn horn of the big horns conch and so on, are all favorite natural handicrafts, with the smooth and oily sea shells carved, inlaid with all kinds of paintings made of the screen, appliances, furnishings, etc., with the color of the bright and beautiful natural, noble and elegant style characteristics. Shells are made into a variety of practical handicrafts, such as wine, ornaments, pendants, necklaces, chest ornaments, etc., exquisite and luxurious not less than jade. Shell carving is also very distinctive. Hainan shell carving craft in the Ming Dynasty has a very high level, and gradually and the ancient coconut carving process combined to form a unique artistic style. All refined Hainan shell carving, and coconut carving, inlaid, or coconut carving for the seat frame. Bright shell carving and simple coconut carving contrast, eye-catching. Bivalve shell has two petals shell, generally ovate, shell body side flat, shell body size is very different. Most bivalves live in the sand, but some can swim freely and are filter feeders, able to feed on microscopic plankton in the water. These shells are common in Hong Kong waters and most of the Indo-Pacific region. They are colorful, beautifully shaped, smooth and bright, and vary in size from egg to ovoid, with the sides of the shell spiraling and folding inward. At present, there are about 190 species distributed in tropical and subtropical waters, while 19 species are found in Hong Kong waters around Tai Peng Wan and Ninepin Island. Baby shells are active and feed at night, mainly on coral polyps, sponges and other microscopic marine organisms. In ancient times, baby shells were a kind of currency in circulation. Taro shells are spotted, patterned or patterned with brilliant colors. The pattern secreted by its outer coat membrane is rich in color and adds character to the shell's beautiful shape. The body of the snail is inverted biconical or ovate, extremely solid, and the conch tower is flattened or slightly protruding. Taro snails live mostly in warm and tropical waters, and among shallow reefs. They are carnivores and use their poisonous gland-containing teeth and tongue to feed on polychaete worms or small fish. There are about 450 species of taro snails growing in tropical waters, 17 of which are found along the coast of Hong Kong. The shells are thick and solid, with different shapes and bodies in the shape of a gyroscope or a pike, with protruding conch towers and layers of dawn coils, nodules or spines. There is no lack of brightly colored bone snails, but their beautiful and pleasing appearance is more attractive. They mostly inhabited in the sand or between the rocks, in all kinds of sea are appeared, especially in the tropical waters or coral reefs along, prey on invertebrates for survival. That's all I know, it was copied from the original, but I don't remember where it came from...

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