Search results
Results from the WOW.Com Content Network
Some species of terrestrial crabs can be found many kilometres from the sea, but have to complete annual migrations to the sea. [3] For example, following the Indian Ocean monsoon , the Christmas Island red crab ( Gecarcoidea natalis ) migrates en masse , forming a "living carpet" of crabs.
The Gecarcinidae, the land crabs, are a family of true crabs that are adapted for terrestrial existence. Similar to all other crabs, land crabs possess a series of gills. In addition, the part of the carapace covering the gills is inflated and equipped with blood vessels. These organs extract oxygen from the air, analogous to the vertebrate lungs.
Johngarthia lagostoma is a species of terrestrial crab that lives on Ascension Island and three other islands in the South Atlantic.It grows to a carapace width of 110 mm (4.3 in) on Ascension Island, where it is the largest native land animal. [2]
Crab (Pachygrapsus marmoratus) on Istrian coast, Adriatic Sea. Crabs attract a mate through chemical , visual, acoustic, or vibratory means. Pheromones are used by most fully aquatic crabs, while terrestrial and semiterrestrial crabs often use visual signals, such as fiddler crab males waving
Coenobita brevimanus is a species of terrestrial hermit crab belonging to the family Coenobitidae, which is composed of coastal living terrestrial hermit crabs.From there it belongs to the genus Coenobita, one of two genera split from the family, which contains sixteen species.
Johngarthia is a genus of crabs in the land crab family Gecarcinidae, formerly included in the genus Gecarcinus, and containing six species. [ Note 1 ] The genus bears the name of John S. Garth , a 20th century naturalist who specialized in crabs and other arthropods.
Most crustaceans are free-living aquatic animals, but some are terrestrial (e.g. woodlice, sandhoppers), some are parasitic (e.g. Rhizocephala, fish lice, tongue worms) and some are sessile (e.g. barnacles). The group has an extensive fossil record, reaching back to the Cambrian.
Gecarcoidea is a genus of terrestrial crabs. The crabs live in forests but must come to the coast to breed. The crabs live in forests but must come to the coast to breed. When it is dry in the summer the crabs are inactive, but when it is the wet season they are ready to migrate.