The cephalothorax is covered by a consistent carapace that presents in its anterior part a spine, called the face, very squashed and flattened laterally, that exceeds the ophthalmic globe. The upper margin of the face has a dozen teeth and a single lower one on the ventral face The dorsal surface is furrowed by three longitudinal grooves delimited by four fine carenas that extend from the face to the posterior area.The two central keels join in the middle of the pereion to continue with the face and the lateral ones on the sides The fourth and fifth legs are sturdy like the first three and shorter than the second pair. The first three pairs of legs are finished in a small pincer and the remaining two in a nail.The abdomen is covered by consistent plates, of which those of the last three segments are keeled dorsally and the keel of the sixth segment ends in a shin The coloration is pinkish-pale brown, with transverse brown rings in the abdominal segments, similar to those of the tiger prawn species.
In estuaries and marshes their younger forms can be caught in quantity. They spend most of the day buried in the sand, emerging from this inactivity at night to procure food.
It feeds on mollusks, worms, and bottom crustaceans, as well as algae. In its larval stages it feeds on phyto and zooplankton.
It is the shrimp typical of our Atlantic and Mediterranean coasts.