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Pediculosis pubis (also known as "crabs" and "pubic lice") is an infestation by the pubic louse, Pthirus pubis, a wingless insect which feeds on blood and lays its eggs (nits) on mainly pubic hair. Less commonly, hair near the anus, armpit, beard, eyebrows, moustache, and eyelashes may be involved.
Emerita is a small genus of decapod crustaceans, [3] known as mole crabs, sand fiddlers, sand fleas or sand crabs. These small animals burrow in the sand in the swash zone and use their antennae for filter feeding .
Like other ghost crabs, they dig deep burrows on sandy beaches, almost always one individual per burrow. They can dig about five inches into the sand in 15 minutes. Their burrows usually have a supplementary tunnel leading upwards from the main tunnel. This is usually used as a temporary refuge when escaping from danger.
Underside of female sand crab with eggs. The sand crab always moves backwards when burrowing or crawling. It can also swim (backwards) and tread water using its back legs. [6] It is a suspension feeder. It burrows backwards into the sand and faces the sea. As each wave retreats, it extends its antennae and catches floating organisms.
Heterotremata is the larger of the two groups, containing the species-rich superfamilies Xanthoidea and Pilumnoidea and all the freshwater crabs (Gecarcinucoidea, Potamoidea). The eubrachyura is well known for actively and constantly building its own burrows. [ 2 ]
Ghost crabs are semiterrestrial crabs of the subfamily Ocypodinae. They are common shore crabs in tropical and subtropical regions throughout the world, inhabiting deep burrows in the intertidal zone. They are generalist scavengers and predators of small animals. The name "ghost crab" derives from their nocturnality and their generally pale ...
The crab louse or pubic louse (Pthirus pubis) is an insect that is an obligate ectoparasite of humans, feeding exclusively on blood. [2] The crab louse usually is found in the person's pubic hair . Although the louse cannot jump, it can also live in other areas of the body that are covered with coarse hair, such as the perianal area , the ...
The crabs do not feed while they stay up on the trees, which indicates that they migrate to avoid predators during high tide. Predators such as fish and hard-shelled crabs can enter the larger burrows of E. versicolor , which forces larger individuals to climb up trees.