Lycophagidae includes Lycophagidae, Lycophagidae, Lycophagidae, etc. Common species, such as Herminidae quadratus, are very large, with large claws over 65,438+00 cm in length, many spiny protrusions on the surface and edge of claws, and thorns on their feet. Terrestrial fishes include ichthyidae, ichthyidae, ichthyidae, etc. The common fishes are ichthyidae and ichthyidae. There are nearly 1000 species in the world and about1000 species in China. Most of them are warm water species, and there are a few cold water species in the Yellow Sea.
Hermit crabs, except for a few species, generally have asymmetrical bodies and soft bellies, and can curl into snail shells (see figure). The tail is also usually asymmetrical. Eyestalk has scales at the base. 1 The antenna mast is often folded, and the base of the second antenna mast has a thorn. The basal joints of the third pair of claws are adjacent to or separated from each other. A pair of pincers, with powerful pincers, are used for eating and defending against enemies. 1 and the second pair of feet are long. The third and fourth pairs of feet used for crawling are generally small and have horny pads, which can support the inner wall of snail shells and stabilize the body. The male genital foramen is opened on the basal ganglia of the fourth (last) pair of feet. The female genital foramen is on the basal ganglia of the second pair of walking feet. Abdominal limb degeneration, both sides are wrong, often only one side exists. Females are more developed and used to hold eggs. The left side of the tail limb and tail segment is often more developed than the right side, with rough horny pads. This special tail fan is used to hook the inside of the screw shell to avoid being pulled out. When the body grows up, the larger empty snail shell can be replaced at any time. Species living in the intertidal zone are often active, while those living in the deep sea are slow. Feed on small animals or dead animals. Land species are omnivorous. Men are usually older than women. In order to compete for females, two males often fight with each other. Usually they usually crawl on the beach or in shallow water. In case of danger, I will shrink into a snail's shell and plug the screws with my claws. A few species burrow or live in the straight tubes of hornbills and worms, and their bellies are not bent. Hermit crabs often live with other animals. For example, hermit crabs often have anemones on their big claws, and some hermit crabs live in sponges or coelenterates. Because these two animals can continue to grow, hermit crabs don't need to change homes often. Hermit crabs are big enough to eat, especially the meat with big claws is delicious. Small ones can be used as poultry feed or bait. Hermit crabs can be used as traditional Chinese medicine.
The hermit crab with fine teeth has a row of teeth below the long segment of the claw foot, and the rear ends of the teeth are particularly large. You can rub and make sound. The area with the highest density of hermit crabs is often in the upper intertidal zone of coral reefs. Many hermit crabs with bare palms, hard shells and slender claws can often be found when turning over the stones in the water. They move quickly and will run and hide quickly. In addition, due to the mild ecological conditions in the tidal pool, it will not be impacted by waves, and it can also retain water at low tide. Most hermit crabs gather at the edge of tidal pools or under rocks in the pools. Due to the sunlight, the temperature in the tidal pool at the high tide line of coral reefs in Lan Yu is high, and the salinity changes greatly, but there are hard-shelled and hard-shelled hermit crabs. From the vertical distribution, terrestrial hermit crabs only inhabit Yu Haibin wetland, fine-clawed hermit crabs only inhabit high intertidal zone, hard-shelled hermit crabs are distributed in the whole intertidal zone and subtidal zone, and true hermit crabs are widely distributed in intertidal zone, subtidal zone and shallow sea area. Take the hard-shelled hermit crab, which has been carefully studied in Taiwan Province, as an example. This hermit crab is widely distributed in intertidal and subtidal zones in tropical and subtropical regions, especially coral reefs and rock platforms. They are the dominant species on most hard coasts, and can be easily found on the seashore of Taiwan Province Province. Different hard-shelled hermit crabs have different habitats, and some species only appear in intertidal zones, such as bare-handed hard-shelled hermit crabs and Seymour hard-shelled hermit crabs. Others often appear in the subtidal zone, such as Hermit Geiger, Hermit Guam and Hermit Miniature. However, some species can be found in intertidal and subtidal zones, such as hermit crabs with hidden hard shells; Other rare species are found on the seabed below the shallow tidal zone, such as hermit crabs, with straight feet and beautiful hard shells. Most hard-shelled hermit crabs are inactive. They often hang upside down under rocks or stay on steep slopes. In the subtidal zone, they gather at the top of coral. When the hard-shelled hermit crab feels disturbed, it will immediately shrink into its shell, plunging itself into the depths of the bushes, making it difficult for the enemy to catch it. This is a very effective way to avoid the enemy. Any two creatures living together as dasdasd are called * * *. The shell carried by hermit crabs is a good hard substrate for benthic organisms, and many organisms were born on it. Among them, echinoderms (especially anemones and polyps) have also been studied in detail under the condition of relatively similar body size. The relationship between most hermit crabs and echinoderms is not absolute, and the relationship between them is not one-to-one correspondence; Most relationships are mutually beneficial, and jellyfish can provide some protection for crabs; Anemones can get hard matrix on the shell and debris when crabs eat. Hydra can also provide some protection for hermit crabs and prevent other large harmful appendages from forming settlements on their shells; In addition to obtaining debris, corals can avoid being submerged by sediment, and even when hermit crabs gather, they can promote the sexual reproduction of corals. When establishing the relationship between hermit crab and anemone, both parties may be active, depending on the species. Both of them have a fixed behavior process to complete this relationship, and they can also trigger this behavior process artificially. Hermit crabs will put anemones in a proper position on the shell to balance the center of gravity or effectively defend against the enemy. In the absence of predators, hermit crabs will gradually lose the behavior of getting anemones, but in the presence of predators, this behavior will resume immediately. Dominant individuals can use anemone as a resource for inferior individuals. Hermit crab's house is a conch shell. When the hermit crab grows up, it must find its own house, attack the conch, kill it and tear it to pieces. Then, go in, hook the top of the snail shell with its tail, support the inner wall of the snail shell with several short legs, climb out of the shell with long legs, and hold the shell mouth with big claws. So, it moved into a new home. Hermit Crab-Distinguish between Marine Hermit Crab and Terrestrial Hermit Crab First of all, about the location of discovery, generally marine Hermit Crab will be found in shallow water of ocean or beach reef, while terrestrial Hermit Crab will be found in inland areas such as beach and coast. Secondly, the size of two pairs of pliers. The left claw of terrestrial hermit crab is larger than the right claw, while the marine hermit crab is not necessarily. The claw feet of marine hermit crabs can be the same size, or the right claw foot is on the left, or the left thorn foot is larger than the right. In addition, the eyes of other species of terrestrial hermit crabs are square except for the two species of terrestrial hermit crabs with short wrists and Cyrillis. The eyes of marine hermit crabs are round. Hermit Crab-Hermit Crab Terrestrial Hermit Crab, also known as Hermit Crab Terrestrial (Coenobita/ commonly known as Hermit Crab Terrestrial), as the name implies, they live not in the sea, but on land. It is said that the hermit crab landed on land from the sea about 23 million years ago, its abdomen became membranous, and its skin evolved to absorb acid in the air and adapt to land life. The terrestrial hermit crabs are classified as follows:
Field: Eukaryotes.
Kingdom: Animal Kingdom (Animal Kingdom)
Phylum: Arthropod phylum.
Class: Crustacea.
Order: Decapoda.
Suborder: Ovipomoea (Flat-bellied suborder)
Suborder: Heteroptera.
Family: Muscidae.
Genus: terrestrial hermit crab
Species: introduction of reference varieties.
1. Hermit Crab with Concave Foot, 1838
2. Hermit crab with short wrist 1852
3. C. Perlatus) H. Milne Edwards, 1837 (orange-red terrestrial hermit crab)
4. Haliotis discus hannai, 1837 (hermit crab)
5. Chlamys farreri Stimpson, 1838 (Hermit Crab)
6. Nobita Viola Scene (C. Viola Scene) Heller, 1852 (Hermit Crab)
7. Cryptosporidium cruzi Herbst, 179 1 (sibelius hermit crab)
8. mcculloch, 1909 (Australian terrestrial hermit crab)
9. H. Milne Edwards, male crab with flat tail, 1837 (Hermit Crab of Ecuador)
1. Echinococcus H. Milne Edwards, 1837 (Hermit Crab)
1 1. Trypanosoma skrjabini, 1775
12. olive Coenobita Olivier (C. Olivier) Owen, 1839)
13. C. carnesens Dana, 185 1
14. Haliotis discus hannai (Haliotis discus hannai/Philippine terrestrial hermit crab) Nakasone, 1988.
(Hermit crab)
15. Rabdosia rubescens (Rabdosia rubescens/Nigerian land hermit crab)
16. Long tarsal gibbon.
17.Birgus la Trolinnaeus, 1767 (coconut crab). But only five species have their names, and other data are unknown. Among them, there are 9 species of terrestrial hermit crabs widely raised in the United States, Australia, Japan and Taiwan Province Province. The varieties are introduced from the aspects of body color, physical characteristics and body size. I hope everyone can understand the characteristics of each variety more clearly. Different species of hermit crabs have different habitats and can be roughly divided into three categories:
① Species that inhabit near the coast and are highly dependent on seawater-orange-red land, deep purple land and Ecuador.
(2) Inside and outside the inland areas, there are basically species that live only by fresh water-concave foot land, short wrist land and siberia willow.
(3) Belonging to the variety between gray land and purple land, distinguishing each variety mainly depends on:
1. Is there a sound generator on the left paw?
2. Does the sting foot have bristles?
3. Left third pectoral muscle-foot-tail segment
4. Male crab's genital shape Hermit crab-Hermit crab with wrinkled skin (Hermit crab with brown color)
Scientific name: Chaetoceros rugosa
Origin: East Africa to South Pacific countries.
Habitat: coastal areas
Body length: the total length is 6- 1 1 cm.
Optimum temperature: 23-28℃ The wrinkled hermit crab is also one of the three primary hermit crabs in Taiwan Province Province, and its body color changes more than that of the concave-footed hermit crab. There are almost all colors from white to black, and the most important feature is the slender claws and legs. There is little difference in size between the two pliers. The wrinkled hermit crab can be regarded as one of the pet hermit crabs with the highest interaction with its owner, so it is also the most popular with its owner. They are not only lively and bold, but also like climbing. They easily accept being taken away by their owners and like to change their shells. Generally speaking, they seem to show a relatively high IQ. So the fun in feeding will be higher.
The artificial environment and food for raising hermit crabs with wrinkles are the same as those for raising hermit crabs with concave feet. You can also use tree cuttings or cultivated soil as the substrate, and replenish fresh water and seawater at any time. Especially when you just get home, you should provide them with seawater immediately. They also apply to group culture or mixed culture. Because they like climbing, they can arrange some rocks or sinking trees to let them climb high.
The wrinkled hermit crab is also a typical nocturnal crab, which usually eats at night, so the feeding time is more suitable at night. They may also be the species with the strongest adaptability to the artificial environment among the three terrestrial hermit crabs in Taiwan Province Province. People who are interested in raising hermit crabs may wish to start with hermit crabs with wrinkled skin. Hermit crab-strawberry hermit crab strawberry hermit crab
Scientific name: Culex longirostris
Origin: Indian Ocean to South Pacific countries.
Habitat: coastal areas
Body length: 5 5- 10/0cm.
Optimum temperature: 2 1-27 degrees Celsius. Strawberry hermit crabs are widely distributed, from Madagascar in the Indian Ocean, through Indonesia, and all the way to Samoa in the South Pacific to the east of Australia. This vast area just covers the tropical waters between the Tropic of Cancer. Taiwan Province Province is also in this area, so it is also distributed. They are the most beautiful and easily distinguishable species among hermit crabs, and they are called strawberry hermit crabs abroad because they are bright red and dotted with white spots, which are almost the embodiment of strawberries. Dr Shi Xide, a hermit crab in Taiwan Province Province, called it Pearl Hermit Crab.
Although terrestrial hermit crabs can live on land, their umbilical cord with the sea has not been cut off, because part of their life cycle must be completed in the sea, that is, from spawning to hatching to larvae. Therefore, strawberry hermit crabs will not and cannot live far from the coast all their lives. It is also necessary to provide fresh water and seawater for them to drink at the same time.
The artificial environment is most suitable for obtaining convenient coral fine sand or broken coral. Build a residence with dead tree bark, and then put a shallow dish of fresh water and a shallow dish of seawater to complete the basic layout. Seawater can be prepared from artificial seawater elements sold in marine fish shops. The lungs of hermit crabs need proper humidity to breathe, so water is absolutely indispensable, especially seawater is the key to raising hermit crabs. Never put hermit crabs in the water, they will drown. In addition, the daily care of strawberry hermit crab is very easy.
They are scavengers, which means they can accept almost anything they can eat. Any feed, fruits and vegetables, rice, dead fish and shrimp are welcome. However, the difference between strawberry hermit crabs and common hermit crabs is that they need to supplement carotene frequently to keep their bright body color. Otherwise, the red color will fade gradually. The best source of carotene is the special brightening feed for shrimp or red tropical fish. In addition, they also have the habit of living in groups, so the individual experience of single rearing is not as good as raising more.
Strawberry hermit crab needs molting, and it needs molting. Hermit crabs usually dig bottom sand to bury themselves when peeling. At this time, the bottom sand needs to be kept moist, and it takes about ten days for the peeled stranger to harden. Injured broken limbs usually regenerate after peeling. As for changing shells, it is a unique pleasure to raise hermit crabs. Hermit crabs must constantly replace larger shells during their growth. Therefore, it is necessary to prepare several shell casings of different sizes for replacement. Hermit crab shops also sell all kinds of exotic shells. These shells are usually polished and very dazzling. Many owners often use their imagination to draw shells, so that their hermit crabs have unique and personalized shells.
Because of the unique breeding mode of hermit crab, it is impossible for hermit crab to breed in artificial environment. The biggest difference between male and female hermit crabs is that the male reproductive pore is located at the waist of the fifth pair of pectoral feet, while the female reproductive pore is located at the fourth pair of pectoral feet. During mating, the male will store the seminal vesicle on the female, and the female will fertilize the egg while laying eggs. About 1-50000 eggs are laid each time. The female will hold the fertilized egg in her stomach for a period of time with her swimming limbs. When the eggs develop to a certain extent, the females will take them to the shore and discharge them, so that the eggs will enter the sea with the waves and hatch into plankton. After peeling in the sea many times, they will evolve into young crabs and then go ashore. After finding shells to live, they will settle down on land.
The wild individuals of strawberry hermit crab can generally survive for 25-30 years, but they can only survive for 2-4 years in artificial environment, which should have a lot to do with being out of the ocean. If we can arrange the intertidal environment of half land and half ocean, we should be able to make them live better and longer. There should be a high proportion of people who have kept hermit crabs in Taiwan Province Province, but few people really know how to keep hermit crabs or really keep them as pets. Perhaps today, with the specialization of raising hermit crabs, we can explore the fun of raising hermit crabs again. Hermit crab-Hermit crab pit Hermit crab
Scientific name: cavi pes Coenobita
Origin: East Africa to Ryukyu Islands.
Habitat: coastal areas
Body length: 5 5- 10/0cm.
Suitable temperature: 2 1-27 degrees Celsius. Hermit crabs with concave feet are characterized by their bright red tentacles. Their body colors range from dark red to taupe or mixed colors, but their tentacles are usually red. Their eyestalks are slightly curved, which other hermit crabs do not have. Hermit crabs with sunken feet are shy or tend to be typical nocturnal, so they often hide in the substrate and come out for foraging activities at night.
The artificial environment and food for raising hermit crabs with concave feet are the same as those of hermit crabs with short hands. Tree cuttings can also be used as substrate, and fresh water and seawater can be supplied at any time. Especially when you just get home, you should provide them with seawater immediately. They will soak in seawater for several hours. They are also suitable for group breeding or polyculture, but a few individuals can also be aggressive, but usually they will not cause serious consequences.
Hermit crabs with concave feet are also native to Taiwan Province Province, and are also common in the southern coastal areas, and are usually scattered in groups in coastal areas. Look carefully when you pick up shells. Maybe there is a concave hermit crab living in it. Hermit crab-Hermit crab Lutz scientific name: earthworm with purple back
Origin: Japanese endemic species. Ogasawara Island south of Kagoshima Island.
Habitat: coastal areas
Body color: purple blue, purple and blue.
Function and brief description:
The eyes are quadrilateral. Except for the body color, it is very similar to a hermit crab. The joints of pincers and pectoral feet are obviously yellow-brown. Oblique particles arranged on the back of the left paw will make a "squeaking" sound. Hermit crabs are milky white when they are young, but with the growth, the purple part will gradually increase, and finally the body will completely turn purple. Hermit crab-Hermit crab with short palm
Scientific name: Coenobita brevimanus
Origin: Indian Ocean to South Pacific countries.
Habitat: coastal areas
Body length: 5 5- 10/0cm.
The optimum temperature: 2 1-27 degrees Celsius. The distribution area of Hermit brachypotheca is similar to that of common Hermit Crab, and they are all distributed in the vast area from the Indian Ocean to the South Pacific Ocean. Taiwan Province Province also has a large ethnic group. Their biggest feature is that their drought tolerance is higher than other hermit crabs, second only to coconut crabs. They also have an oversized purple left paw, round eyes and dark tentacles, which makes them easily distinguished from other hermit crabs produced in Taiwan Province Province.
The artificial environment for raising hermit crabs with short palms is similar to that of strawberry hermit crabs. It is most suitable for obtaining convenient coral fine sand or broken coral. Build a residence with dead tree bark, and then put a shallow dish of fresh water and a shallow dish of seawater to complete the most basic layout. Other devices can be added according to personal preference. Of course, it is more ideal to prepare several empty shells of different sizes for them to replace at any time. The lungs of hermit crabs need proper humidity to breathe, so water is absolutely indispensable, especially seawater is the key to raising hermit crabs. Never put hermit crabs in the water, they will drown. Hermit crabs don't like high humidity, and keeping the substrate dry is more suitable for their habits. .
They are also scavengers and can accept almost anything they can eat. Any feed, fruits and vegetables, rice, dead fish and shrimp are welcome. In addition, they are gentle, so they usually don't fight with other species. Their desquamation habits, like other hermit crabs, will get into the substrate to desquamate and reappear after desquamation.
Because of the unique breeding mode of hermit crab, it is impossible for hermit crab to breed in artificial environment. The biggest difference between male and female hermit crabs is that the male reproductive pore is located at the waist of the fifth pair of pectoral feet, while the female reproductive pore is located at the fourth pair of pectoral feet. During mating, the male will store the seminal vesicle on the female, and the female will fertilize the egg while laying eggs. Lay tens of thousands of eggs at a time. The female crab will hold the fertilized egg in the abdomen for a period of time with its swimming limbs, and then take it to the shore for discharge, so that the egg will enter the sea with the waves and hatch into plankton. Peeling in the sea for many times will lead to the evolution of young crabs before landing. After finding shells to live, they will settle down on land and start their land life.
Hermit crabs with short claws are also common in the seashore of Taiwan Province Province, but most of them are larvae, and sub-adults or adults are rare, mainly imported from Southeast Asia. But because it is not difficult to raise hermit crabs, it is not difficult to raise their larvae as long as you know the correct method. At least it's easier than raising reptiles. Hermit Crab-Reference This is all the information about hermit crabs.