They have a distinctive bulge on the top of their head.
They can dive down to depths of 1000m or more within a 50 min time span.
They are found most commonly in the far north Atlantic.
Polar bears, sharks, and orca
Found from Alaska to Canary and the Caribbean Islands.
Social system/Group size
They are found in groups consisting of up to 200 individuals.
They are threatened by hunting, and oil spills pose a potential threat to their health as well.
They have bee tracked using satellite tags to find out more about their population and dynamics.
The protruding bulge on their heads is their bladder and is used to attract a mate by inflating the bladder pocket to a balloon-like state.