Fiddler crabs have numerous adaptations for life on land, and they also display astonishing behavioural complexity and adaptability for an invertebrate.Fiddler Fiddler crabs, belonging to the family Ocypodidae and subfamily Ucinae, are widely distributed throughout the world's tropics and subtropics. Austruca annulipes exact colour is known to be a smooth orange to red claw and a black shell with blue or white stripes. Austruca annulipes, the Body width is about 1.5-2 cm. The main cheliped of a

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... male fiddler crab is larger than the minor cheliped, which is smaller. Antimicrobial protein spresent in Austruca annulipes Until now some proteins have been identified in this species. Fiddler crabs typically live in intertidal environments with muddy or sandy open flats of protected coastlines, river banks, salt marshes, and mangrove muck. Austruca annulipes usually pink, but occasionally almost white, the expanded pincer is.