|Binomial name||Physeter macrocephalus|
The sperm whale grows between 36-52 ft (11-16m) with a weight between 15-50 tons.
Sperm whales have a dark gray-body with a squarish head and a hump instead of a dorsal fin.
Their blowhole is slit-like, and they can often be seen laying motionless at the surface of the water.
They have a single calf after a long gestation period of 14-16 months.