Bass is the name of a number of fishes of several genera, but originally belonging to a genus of sea-fishes (Labrax) of the perch family, distinguished from the true perches by having the tongue covered by small teeth and the preoperculum smooth. Labrax lupus, the only British species, called also sea-dace, and from its voracity sea-wolf, resembles somewhat the salmon in shape, and is much esteemed for the table, weighing about 15 Ibs. Labrax linedtus (Roccus linedtus), or striped bass, an American species, weighing from 25 to 30 Ibs., is much used for food, and is also known as rock-fish. Both species occasionally ascend rivers, and attempts have been made to cultivate British bass in fresh-water ponds with success. Two species of black bass (Micropterus salmoides and Micropterus dolomieu), American freshwater fishes, are excellent as food and give fine sport to the angler. The former is often called the large-mouthed black bass, from the size of its mouth. Both make nests and take great care of their eggs and young. The Centropristis nigricans, an American sea-fish of the perch family, and weighing 2 to 3 Ibs., is known as the sea-bass.