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This page was last edited on 13 December 2019, at 00:43 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
The fiddler crab or calling crab can be one of the hundred species of semiterrestrial marine crabs in the family Ocypodidae. [2] These crabs are well known for their extreme sexual dimorphism, where the male crabs have a major claw significantly larger than their minor claw, whilst females claws are both the same size. [ 3 ]
Afruca tangeri is one of the largest species of fiddler crab, with a carapace up to 50 millimetres (2.0 in) wide, [3] and up to 25 mm (1.0 in) long. [4] The males have one claw much larger than the other, which they use for communication. [5]
Leptuca leptodactyla, commonly known as the thin-fingered fiddler crab or the western Atlantic fiddler crab, is a species of fiddler crab native to the western Atlantic coast of the Americas. [ 1 ] Taxonomy
Between 2018 and 2021, there was an unexpected 92% decline in snow crab abundance, or about 10 billion crabs. The crabs had been plentiful in the years prior, puzzling scientists and crabbers alike.
The adult crab's carapace is usually between 10 and 16.5 millimetres (0.39 and 0.65 in) wide. [4] Non-breeding males have a green carapace and red major cheliped; when breeding, the carapace of the male whitens. [4] The major cheliped can remain red or also whiten.