Uca tangeri
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Uca tangeri
West African fiddler crab
Males fighting.
Portugal, distrito de Faro, Alvor.
4/22/2019
IE016'09-190422154'JJK
The genus Uca shows strong sexual dimorphism manifested by extensive development of one of male's claws. Large claw, that represents almost a half of body weight, is used for territorial fighting and for a waving display.