It is one of the fish that can be captured from coast, and also embarked. It makes some brackish inner water income, like the rivers Salado and Samborombón, thanks to their eurihalina capacity. Its size varies between the 40 and 60 cm and weight of one to two kilograms. They have been exemplary of around 20 years, which indicates that longeva is a enough species. It has character pregiver of small coastal fish demonstrated in its behavior and the form of its mouth, with inferior maxilar more length being the mouth upwards. It is fished with more or less light equipment with line of bottom and incarnating with filet, prawns, shrimps, or clams and also with artificial decoys. It is a strong and fighting fish.
The body is fusiform, slightly cleared, divided dorsal fin, forming two contiguous ridges; first with thorny radios only, second with a thorny radius and other soft ones. The fin of great volume is truncated. The anal is short, finalizes in front of the level of the dorsal completion. The lateral line runs compares to the line of the back until the height of half of the second dorsal fin, approximately, soon it continues by the mean line of flanks and finishes on the fin of great volume. The body is of gray color and with the yellow tail. The diet of pescadilla varies in agreement with the age. The youthful ones are fed mainly on crustaceans (white shrimp, shrimp, young of prawn) and to a lesser extent on fish, like anchoíta. But as it grows, the small fish happen to be the greater component of the diet. Pescadilla exists another called species real (Macrodon ancylodon), that differs in little from pescadilla common, and is recognized it because the fin of great volume finishes in end, unlike the common one that she is straight.