About Leptomithrax gaimardii (H.Milne Edwards, 1834)
This species of crab, Leptomithrax gaimardii, has a rounded red-brown carapace that grows up to 16 cm (6.3 in) wide, with a maximum leg span of 40 cm (16 in). Seaweed and sponges sometimes attach to the bodies of these crabs. During the breeding season, these crabs form groups that often contain more than 100 individuals. Breeding happens just before winter moulting, when soft new shells leave the crabs more vulnerable to predation. Gathering in large groups reduces their vulnerability to predation during this period. Leptomithrax gaimardii is a scavenger. It can be found in areas with seaweed, reef, and sand, at depths reaching up to 820 m (2,690 ft).
