This large crustacean (marine animal), with no forceps, measures up to 50 cm and weighs up to 4 kg.The segmented body is covered with a reddish to brownish carapace with two yellowish spots on each abdominal segment. Legs and antennae are striped with brown and yellow. The head is covered with strong spines and bears two compound faceted eyes protected by two triangular frontal horns, two small antennae , two antennae directed rearward and longer than the body, two mandibles crushing and four jaws with blades sharp.