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Ovalipes catharus, commonly known as the paddle crab, [a] swimming crab, [b] or, in Māori, pāpaka, [8] is a species of crab in the family Ovalipidae. [ 4 ] [ 9 ] It is found in shallow, sandy-bottomed waters around the coasts of New Zealand , the Chatham Islands , and uncommonly in southern Australia .
Ovalipes australiensis, commonly known as the sand crab or the surf crab, [2] [3] is a species of crab in the family Ovalipidae. [4] Its range extends from Western Australia to Queensland , including Tasmania . [ 5 ]
Ghost crabs are negatively affected by human activity on sandy beaches, such as sand trampling by foot traffic, the building of seawalls, or the presence of inorganic pollutants. Due to their worldwide distribution and the ease by which their burrows can be surveyed, ghost crab burrows are regarded as valuable ecological indicators for quickly ...
The common term sand crab can refer to various species of crustacean: Crustaceans of the superfamily Hippoidea, often known as mole crabs; Hippidae, a family within Hippoidea; Emerita, a genus within Hippidae; Crabs of the subfamily Ocypodidae, also commonly known as ghost crabs
Arenaeus cribrarius often bury themselves entirely in sand, but leave a gap for water to pass to their gills. [6] The crabs maintain the gap by clearing the sand with their claws and hairs around their mouth area. [6] Arenaeus cribrarius is a nocturnal and solitary organism, which only interacts with other crabs of its species when it wants to ...
The sand crabs with soft shells that have just moulted are kept for bait, while the hard-shelled crabs are thrown back into the sea. [ 6 ] The sand crab has been evaluated as an indicator species for monitoring the level of domoic acid -synthesizing diatoms ( Pseudo-nitzschia spp.) which sometimes cause toxic blooms off the coast of California.
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The Atlantic ghost crab, Ocypode quadrata, is a species of ghost crab.It is a common species along the Atlantic coast of the United States, where it is the only species of ghost crab; [2] its range of distribution extends from its northernmost reach on beaches in Westport, Massachusetts, south along the coasts of the tropical Western Atlantic Ocean to the beach of Barra do Chui, in Rio Grande ...