1. Distribution range: sea crayfish are distributed in waters around the world, from the coast to the edge of the continental shelf of the stony, sandy or muddy seabed have its habitat. The leatherback shrimp, on the other hand, lives inshore along the coast and is distributed in intertidal and deep-sea mud or coral reefs.
2. Eating habits: sea crayfish to live fish, shellfish, other crustaceans and seaweed for food, and sometimes eat animal carcasses. The pikeminnow, on the other hand, is a bottom ?2 burrowing shrimp, feeding on small invertebrates and organic detritus.
3. Appearance characteristics: the sea crayfish carapace is relatively thick, cephalothoracic armor is slightly flattened laterally, the anterior lateral margins in addition to the crayfish family, do not heal with the mouth anterior plate, the lateral margins are not with the thoracic abdominal armour and the thoracic limb base healing. In contrast, Peeper shrimp have more developed scales, as well as unibranchial steppers. Of these, the first three pairs of chelipeds, the first of which is particularly powerful and thick, are called crayfish.
In general, although the sea crayfish and leather shrimp in the distribution range, eating habits, appearance and other aspects of the characteristics of the obvious difference, but are important seafood economic animals, with rich nutritional value.