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The Japanese spider crab (Macrocheira kaempferi) is a species of marine crab and is the biggest one that lives in the waters around Japan. At around 3.7 meters, it has the largest leg-span of any arthropod. The Japanese name for this species is taka-ashi-gani, (Japanese: タカアシガニ), literally translating to “tall legs crab”. It ...
family Majidae Samouelle, 1819 – "true" spider crabs; family Mithracidae Balss, 1929; family Oregoniidae Garth, 1958; family †Priscinachidae Breton, 2009; Notable species within the superfamily include: Japanese spider crab (Macrocheira kaempferi), the largest living species of crab, found on the bottom of the Pacific Ocean.
Majidae is a family of crabs, comprising around 200 marine species inside 52 genera, with a carapace that is longer than it is broad, and which forms a point at the front. The legs can be very long in some species, leading to the name "spider crab".
Macrocheira is a genus of crab in the superfamily Majoidea. [1] It contains the Japanese spider crab ( Macrocheira kaempferi ) as well as an extinct species, Macrocheira longirostra . [ 2 ]
Longnose spider crab: Atlantic coast of North America: Uses noxious alga Dictyota menstrualis [1] Loxorhynchus crispatus: Masking or moss crab: Eastern Pacific Ocean [1] Prefers to decorate with bryozoan Bugula neritina: Hyas araneus: Great spider crab: North Atlantic, North Sea [5] Camposcia retusa: Harlequin crab or spider decorator crab ...
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 .
Maja squinado (the European spider crab, spiny spider crab or spinous spider crab) is a species of migratory crab found in the Mediterranean Sea. [1] The appearance of the European spider crab is similar to the much larger Japanese spider crab, although the European spider crab belongs to the family Majidae, and the Japanese spider crab belongs to a different family of crabs, the Macrocheiridae.
As a decorator crab, this crab attaches seaweed or algae from its environment to the hooked hairs on its body, which gives this crab camouflage along the ocean floor. [6] Hairy seaweed crabs change their camouflage with 10-20% of the cover being replaced each day, this causes their movement to be very sluggish like many other spider crabs.