It is a very interesting fish from the activity of sport fishing, since she is frequent inhabitant of the coasts of low depth and puesde with no need to fish itself to embark. Also one is in waters estuarinas and usually it incursionar by the rivers. It is of fusiform, robust body, slightly compressed laterally, covered with very visible grudges that give a blue color him turning to the dark gray but in the back, with clear flanks but until a gray silverplated in the belly. It has a single lateral line that distinguishes it. It has two dorsal fins, the first but small and triangular, second extends from shortly before half of the body and almost to the fin of great volume, with the first elevated radii but. The fin of great volume and pectoral is of a dark gray, and ventral and the anal one is white. The truncated volume. Its head is small in relation to the body giving him certain delicate aspect. The mouth is On guard terminal, of thin lips, and they do not get to exceed the previous edge of the eyes. One is mainly in the patagónica region and is one of the susceptible species of capture through artificial decoys. In Puerto Madryn fishing with fly with great results becomes and in the channel of Beagle Spinning in Lapataia Bay becomes, in desague of the lake Roca.