Dolphin,bodily form looks like the fish,the mouth is thin and long,upper and lower jaws have 46- 6 sharp and thin teeth respectively,the body is thin and long ,generally about 2- 2.meters long.The back in the shape health of streamline,the dorsal fin with sickle form .The back is greyish black,the belly is white,the place close to head of belly has a pair of pectoral fins.The weight is between 100- 20 kilograms.Although its mouth is kissed long,there are so many teeth in the mouth,it can't chew the food ,just consume small fish ,shrimp ,cuttlefish ,etc..