Although it has a great distribution, from the south of Mexico to the gulf San Matías, is one of the emblematic fish of the sport fishing of coast in the Argentine sea. It is a marine perciforme of fusiform body, with a high index of robustness, covered by great and strong grudges. It has the great head and the small mouth, excelling a little the superior jaw on the inferior one, leaving to the ventral mouth On guard with a series of three marginal pores and five later ones. Pre-opérculo is sawed. It has two dorsal fins, the previous one provided with hard radios, the volume truncated and the small anal, preceded by two thorns, of which first well it is developed. One always does not appear of he himself color, reason why the fishermen appeal to the recognition from their forms. He varies between the target and the brown one, happening through a yellow golden in the ventral zone. The back is dark with oblique striae darker than they fall towards flanks. The so large average oscillates in the 40 cm . Their habits and feeding vary throughout their life and of the geographic place where it is. It is bentónico in general, is grouped in shoals of fish become attached to the bottom, specially at time of egg-laying and one feeds on organisms of the bottom - moluscos bivalvos, small snails, shrimps and other crustaceans and to a lesser extent of small fish like anchoíta and anchovy. Their capacity to resist and to adapt to changes of salinity and temperature allow him to occupy spaces within the sea very different, reason why it is possible to find them in estuaries and oceanic waters. Longeva is a species, the Maxima age registered is of 30 years.