What are crustaceans?

crustaceans are arthropods such as insects, but unlike their cousins, they primarily adapted to life in the oceans. The term "Crustean" comes from the Latin word Crusty , which means "bark, shell or hard surface". Like other arthropods, crustaceans have a hard shell, often stronger than its insect cousins ​​and almonds used to handle and consume food. The sparrows differ from other arthropods in that they are a monophyletic group (descending from an ordinary ancestor) and have a biramic (branching) of the limbs. There are also earthly crustaceans, such as earthly crabs, woodcuts and terrestrial hermits. In the typical forest are billions of Woodlice and some Pacific Islands are literally swarming with earthly crabs. Some, like a coconut crab, are huge, with a foot span of 2 m (6 ft) and weights of up to 4 kg (9 lb). The coconut crab is the largest living land arthropod, capable of crushing coconut nuts with the only hammer of his claws. Occasionally he consumes rats and attacks a man, PTerrible would be endangered even if no death has been reported.

There are several less known crustaceans. One of them is the giant isopod, Bathymymus giganteus , legs long relatives of Woodlice, who slowly pass through ocean floors and consume detritus. Giant Isopods, used to the relatively desert similar to the environment of deep ocean floors, are able to go for two months without food for two months. These animals were first discovered by French zoologist Alphon Milne-Edwards in 1879 after caught a sample from the Gulf of Mexico. At that time, the discovery was praised by scientists and the public, and it helped to prove that ocean floors were not completely lifeless. Yet there are many people who have never heard a giant isopod and consider them to be models or result of Photoshopping after viewing images of giant isopods.

Another class of unknown crustaceans are lice crustaceans that infect each introduceElna ocean creature. The training whale, which is located in skin lesions, genital folds, nostrils and whale eyes, can reach the size of the thumb.