Horseshoe Crab

The Life of Animals | Horseshoe Crab | The whole body of the horseshoe crab is protected by a hard shell. Horseshoe crabs are normally swim backward inclined approximately 30 ° with respect to. Juveniles grow about 33% larger with each molt until they reach adult size. During the breeding season, horseshoe crabs migrate to coastal waters. Males select a female and cling to his back. The female digs a hole in the sand and lay their eggs while the male fertilizes them. Many waders eat eggs to hatch. Eggs take about two weeks hatch. It proved difficult to raise horseshoe crabs in captivity. There are reasons to believe that mating occurs only in the presence of sand or clay, in which the horseshoe crab eggs hatch.

Unlike mammals, horseshoe crabs, the hemoglobin in the blood, but instead use hemocyanin to carry oxygen. Because of the presence of copper in hemocyanin, their blood blue. Their blood contains amoebocytes which plays a role similar to that of white blood cells of vertebrates to defend the body against pathogens. L. polyphemus amebocyte blood used for the preparation of Limulus amebocyte lysate, which is used to detect bacterial endotoxins. Harvesting Horseshoe crab blood involves collecting and bleeding the animals and release them into the sea most of the animals survive the process, mortality related to both the amount of blood from a particular animal, and experience stress during handling and transport.

Horseshoe crabs are used as bait to fish for eel (U.S. in particular) and Whelks. However, the horseshoe crab temporarily prohibited in New Jersey (moratorium on farm) and limited to men in Delaware. It is assumed that the low population of horseshoe crabs in the Delaware Bay threatening the future of the red ribbon.  

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King crab

 

The Life of Animals | King crab | Golden king crab, Lithodes aequispinus, is captured on the coast of Alaska in the Aleutian chain. Gold king crab is significantly smaller than the king crab red and blue, about 5-8 pounds (2.3 to 3.6 kg). It tastes like the red and blue king crabs, though perhaps sweeter. Note to occur in waters deeper than red king crab, often in the depths of 300 miles (1,800 feet, 550 m). Crabs king's golden youth are intricate and confidence in the structure-forming sessile invertebrates growing on the seabed like corals, sponges, sea whips provide Habitat. Habitat is the main factor that separates the range of red and blue king crabs in the Bering Sea.

 

 

Red king crab, Paralithodes camtschaticus, is a large species, reaching a thickness of 11 heavy shells (28 cm) and a leg extension 6 feet (1.8 m). Its natural range is the Bering Sea, the Aleutian Islands and St. Lawrence Island. You can now also in the Barents Sea and Arctic Europe, where it is drawn, and now it has become a plague of blue king crab, Paralithodes platypus, lives near St. Matthew Island, Pribilof Islands, and the Diomede Islands, Alaska and they are the people of Japan and the Russian king crab from Pribilof Islands are the largest of all king crab, sometimes more than 18 LB (8 kg) weight.

Hermit Crab

 

 

The Life of Animals | Hermit Crab | Most species have long, spirally curved abdomens, which is soft, unlike the hard, calcified abdomens appear in crustaceans. Protected from predators by a salvaged empty seashell Hermit Crab wounded abdomen, where the whole body back. The top of the abdomen is adapted to clasp strongly onto the columella of Cancer hermit snail shell. HERMIT CRAB, as its size increases, it becomes the shell find a large, and not before. The habit of living, but the shell gives the popular name "hermit of Cancer", by analogy with the hermit, who lived a few Hermit Crab species, and land and sea, as "vacancy chain" of the new BUZZ When new, the clay is, hermit crabs collected and formed of all the surrounding him from the modes of the greatest to the least. Cancer Cancer is brought to the maximum with the shell, the maximum time it was published before the new shell is the shell of Cancer,

Hermit Crab species range in size and shape, a species with a few heavy shells religious brevimanus mm long, can live 30-70 years and were approaching the size of a pain. Shell-less hermit Cancer Birger robber (Coconut Crab) This is a terrestrial invertebrates. Hermit Crab zoea larvae hatch, especially in the third stage. Many marine species of hermit crabs is common in the marine aquarium trade. Nearly 15 species of terrestrial world, the following are commonly kept as a concern: Caribbean Hermit Crab (religious and shielded), the Australian land hermit Crab (religious variable) and the Ecuadorian Hermit Crab (religious compressed).

Yeti Crab

 

  
The Life of Animals | Yeti Crab | K. hirsuta was discovered in March 2005, a group organized by Robert Vrijenhoek of the Monterey Bay Aquarium Research Institute in Monterey, Calif. And Michel Segonzac of the Ifremer and the Census of Marine Life scientist's use of the submarine DSV Alvin, operating from RV Atlantis. The discovery was announced March 7, 2006. Hairy pincers contain filamentous bacteria, which the creature can be used to neutralize toxic minerals from the water emitted by the hydrothermal vents, where he lives.

The term "furry lobster" is usually used for family Synaxidae. McPherson et al. Named the genus Kiwa after "goddess of shellfish in Polynesian mythology," but it is the sea in Maori mythology Kiwa Guardian Hirsuta means "hairy" in Latin.

Crab

 

The Life of Animals | Crab | Generally Crabs are covered with a thick exoskeleton, and armed with a single pair of chelae (claws). Crabs are found in all of the World's Oceans, while many crabs live in fresh water and on land, particularly in tropical regions. Crabs Vary in size from the pea crab, A Few millimeters wide, to the Japanese spider crab, with a leg span of up to 4 meters (13 ft). About 850 species of crab are freshwater, terrestrial or semi-terrestrial species They are found throughout the world's tropical and semi-tropical regions.

The earliest unambiguous crab fossils date from the Jurassic, although Carboniferous Imocaris, known only from its carapace, may be a primitive crab. Often Crabs show marked sexual dimorphism. Often males have larger claws, a tendency the which is particularly pronounced in the fiddler crabs of the genus Uca (Ocypodidae). In fiddler crabs, males have one Claw the which is greatly enlarged and the which is used for communication, particularly for attracting a mate Another conspicuous difference is the form of the pleon (abdomen); in most male crabs, this is narrow and triangular in form, while females have a broader, rounded abdomen.

Some crabs, Notably the Portunidae and Matutidae, are also capable of swimming. Crabs are Mostly active animals with complex behavior patterns. Crabs growing niche to be aggressive males Towards Often one another and fight to gain access to females. Crabs are omnivores, feeding primarily on algae, and taking any other food, including molluscs, worms, other crustaceans, fungi, bacteria and detritus, Depending on Their availability and the crab species. The evolution of crabs is characterized by an increasingly robust body, and a reduction in the abdomen. Although many other groups have undergone similar processes, carcinisation is most advanced in crabs.

The movement of the female gonopore to the sternum defines the clade Eubrachyura, and the later change in the position of the male gonopore defines the Thoracotremata. It is still a subject of debate whether Those crabs where the female, but not male, gonopores are situated on the sternum, form a monophyletic group