Soosoo, Or Souson, the native name of the dolphin of the Ganges, a fresh-water cetacean of the genus platanista (F. Cuv.). In this, the only described species (P. Gangetica, F. Cuv.), the body is from 20 to 24 ft. long, thickest in front and gradually tapering to the tail; the head obtuse; the jaws nearly equal, almost straight, slender, compressed at the sides, expanded at the end, and from 3 to 4 ft. long; the teeth are conical, projecting from the gums, largest, nearest together, and most curved in front, interlocking in the two jaws, and laterally near together in the lower jaw; the symphysis very long; the blow-hole a longitudinal fissure, an unusual form; eyes very small, shining black, deeply sunk, and 4 in. above the angle of the mouth; auditory foramina open but small; the pectorals fan-shaped, l½ ft. long and 1 ft. broad posteriorly; dorsal much depressed and nearest the tail; caudal 2½ ft. wide and festooned. The color is shining pearly gray, with a few lighter colored spots; the fat under the skin is highly prized by the Hindoos as an external application in painful diseases.
It is carnivorous, feeding principally on fish, in the pursuit of which it is very active, but at other times is rather slow.
Soosoo, or Dolphin of the Ganges (Platanista Gangetica).
It inhabits the Ganges as far as the head of navigation, but is most abundant where its numerous mouths open into the sea.