Caranguejo-Uçá Azul (Cardisoma guanhumi) or Guaiamum, Goiamum, Goiamu, Fumbamba or Caranguejo-mulato-da-terra is a land crab found in estuaries and other maritime areas along the Brazilian coast. The species varies in color from dark blue to brown or pale grey, and may grow to 11 cm in width and weigh over 500 grams . Caranguejo-Uçá Azul is omnivorous, collecting and eating leaves and fruits close to its burrow whilst also eating insects and carrion. Like many crabs, this species is cannibalistic. Don´t like direct sunlight for prolonged periods, they prefer to feed at night.