The brown shrimp, Penaeus aztecus, is a genus of grooved, burrowing shrimp, familiar in Florida waters. Tentacles are considerably longer than body length. Its carapace has a medial carina on the anterior surface that is bordered on either side by a broad, to some extent rounded groove. The famous rostrum is vaguely upturned with five or ten sharp teeth on the upper edge. The integument is thin and translucent in appearance. Chromatophores give the animal a brown to olive-green facade Brown shrimp are found in the western North Atlantic, from Massachusetts to Campeche in Mexico. They are the most abundant in the waters off Texas. Brown shrimp are high in protein, vitamin C, iron, and calcium but also moderate in sodium content and low calorie. This species show signs of sexual dimorphism,