Although its strong limbs were able to support it both on land and at sea, Ambulocetus lived principally in the water. Swimming like an otter but killing like a crocodile, it lurked patiently at the water's edge, suddenly ambushing its often sizable prey before dragging it into the water to be drowned.

PRONUNCIATION: AM-BYU-LO-SEE-TUS
LIVED: 50 – 49 million years ago
SIZE: 9.8 feet long
FACT: Carnivorous, eating large animals
MEANING: Walking whale
CLOSEST LIVING RELATIVE: Whales
RANGE: Asia