ABSTRACT The size composition, growth patter and feeding habit of 395 crab specimens of the hairy mangrove crab - S. huzardii, fiddler crab - U. tangeri and land crab - C. armatum collected from the mangrove swamp of the Lagos Lagoon were examined for six months. The carapace length of S. huzardii ranged from 1.70 cm - 4.60 cm (Carapace width from 1.90 cm - 3.60 cm) whilst that of U. tangeri ranged from 1.10 cm - 3.60 cm (Carapace width from 1.40 cm - 4.20 cm) and C. armation 4.50 cm - 9...