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King crabs superficially resemble true crabs but are generally understood to be closest to the pagurid hermit crabs. [2] [4] [5] This placement of king crabs among the hermit crabs is supported by several anatomical peculiarities which are present only in king crabs and hermit crabs, making them a prominent example of carcinisation among ...
A red king crab. The example of king crabs (family Lithodidae) evolving from hermit crabs has been particularly well studied, and evidence in their biology supports this theory. For example, most hermit crabs are asymmetrical, and fit well into spiral snail shells; the abdomens of king crabs, even though they do not use snail shells for shelter ...
Anomura (sometimes Anomala) is a group of decapod crustaceans, including hermit crabs and others. Although the names of many anomurans include the word crab, all true crabs are in the sister group to the Anomura, the Brachyura (the two groups together form the clade Meiura).
Crabs vary in size from the pea crab, a few millimeters wide, to the Japanese spider crab, with a leg span up to 4 m (13 ft). [6] Several other groups of crustaceans with similar appearances – such as king crabs and porcelain crabs – are not true crabs, but have evolved features similar to true crabs through a process known as carcinisation.
Lithodes longispina is a species of king crab. [1] [2] It has been found in Japan and Taiwan. [1] [2] Before 2010, its reach was thought to be much greater than presently understood, such as Australia, New Zealand, and Guam. [3] It has also allegedly been sighted in the Northwestern Hawaiian Islands. [4]
The red king crab (Paralithodes camtschaticus), also called Kamchatka crab or Alaskan king crab, is a species of king crab native to cold waters in the North Pacific Ocean and adjacent seas, but also introduced to the Barents Sea. It grows to a leg span of 1.8 m (5.9 ft), and is heavily targeted by fisheries.
The ocean around Alaska is now becoming inhospitable for several marine species, including red king crab and sea lions, experts say. A warmer Bering Sea is also ushering in new species ...
Lithodes santolla, also known as the southern king crab, Chilean king crab or centolla, is a species of king crab, found off southern South America including the offshore Falkland Islands. [3] On the Pacific side, it is found in Chile from Talcahuano to Cape Horn. [3] [4] On the Atlantic side, it is found off Argentina and Uruguay. [3]
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