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The ocean floor is not all flat but has submarine ridges and deep ocean trenches known as the hadal zone. [6] For comparison, the pelagic zone is the descriptive term for the ecological region above the benthos, including the water column up to the surface. At the other end of the spectrum, benthos of the deep ocean includes the bottom levels ...
Crabs are decapod crustaceans of the infraorder Brachyura (meaning "short tail" in Greek), which typically have a very short projecting tail-like abdomen, usually hidden entirely under the thorax. [a] They live in all the world's oceans, in freshwater, and on land. They are generally covered with a thick exoskeleton. They generally have five ...
The hydrothermal vents where these crabs live are typically short lived, lasting from 10 to 100 years. These are extreme environments, with high temperatures, high concentrations of sulphides, heavy metals, carbon dioxide and an acidic environment. [8] At this depth there is also limited access to light making photosynthesis nearly impossible.
Crabs of the family Panopeidae are all free-living (not commensal or parasitic), [2] and typically live in soft-bottomed parts of the ocean, [3] lending them the common name "mud crabs" (a name also shared by other organisms). They burrow into the sediment and feed on a variety of marine invertebrates. [3]
The crabs can travel up to 1.46 km (0.91 mi) in a day, and up to 4 km (2.5 mi) in total. [4] Only a few land crabs, including certain Geosesarma species, have direct development (the mother carries the eggs until they have become tiny, fully developed crabs), and these do not need access to water to breed.
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Kiwa puravida is a species of deep-sea dwelling decapod, a member of the genus Kiwa, a genus of animals sometimes informally known as "yeti crabs". [1]The crabs live at deep-sea cold seeps where they feed on symbiotic Pseudomonadota, which they cultivate on hair-like projections on their claws.
By Gillian Pensavalle No, there's not a gigantic 50-foot crab hanging out in a small harbor town in the UK. Foiled again, Internet. Photoshop strikes again; the photo is fake. The photo made ...