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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 ]
Minuca pugnax is the most common species of fiddler crab on the east coast of the United States.Its natural range extends from Cape Cod to northern Florida. [2] In 2014, its northern limit was extended to Hampton, New Hampshire, as a result of a range expansion possibly due to climate change. [3]
Leptuca speciosa, commonly known as the brilliant fiddler crab or the longfinger fiddler crab, is a species of fiddler crab native to the southern United States, Mexico, and the Caribbean. [1] Before 2016, the species was known as Uca speciosa. In 2016, the subgenus Leptuca was promoted to the genus level. [2] [3]
In fiddler crabs, males have one greatly enlarged claw used for communication, particularly for attracting a mate. [13] Another conspicuous difference is the form of the pleon ( abdomen ); in most male crabs, this is narrow and triangular in form, while females have a broader, rounded abdomen. [ 14 ]
Leptuca deichmanni, commonly known as Deichmann's fiddler crab, is a species of fiddler crab native to the eastern Pacific coast of Central America, in Costa Rica and Panama. [ 1 ] Taxonomy
Leptuca thayeri, known generally as the Atlantic mangrove fiddler crab or mangrove fiddler, is a species of true crab in the family Ocypodidae. It is distributed all across the Western Atlantic. [1] Leptuca thayeri was formerly a member of the genus Uca, but in 2016 it was placed in the genus Leptuca, a former subgenus of Uca. [2] [3] [4]
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 Ocypodidae are a family of semiterrestrial crabs that includes the ghost crabs and fiddler crabs. They are found on tropical and temperate shorelines around the world. Some genera previously included in the family are now treated as members of separate families in the superfamily Ocypodoidea, such as the Dotillidae and Macrophthalmidae.