Gelasimus vomeris (McNeill, 1920)
Abundant in the Solitary Islands Marine Park. Distributed throughout the south-western Pacific Ocean. In Australia recorded from Darwin in the Northern Territory, coastal Queensland and south to at least Sydney in New South Wales.
Frequents unshaded sandy mud in bays, estuaries and creeks, along lower tide levels.
Males have a conspicuous dominant claw (or chelae), the lower half orange, upper half grey to pink, that is used to repel other males and to attract females. The eyestalks are long and thin, and the carapace is brown-black in colour with blue green blotches. The claws on the female are small and blue green in colour. Grows to around 30 mm across the carapace.
Davie, Peter. Wild Guide to Moreton Bay and Adjacent Coasts. Second Edition. Published by Queensland Museum. Vol 2, p. 246.
Atlas of Living Australia website at https://bie.ala.org.au//search?q=uca+vomeris. Accessed 15/11/2018.