Cetaceans are kept warm by a thick insulating layer of fat, known as blubber, which in the bowhead whale can be as thick as 50 cm.
(Cetaceans; are kept; by a thick insulating layer of fat) (fat; known; as blubber) (blubber; can be; as thick as 50 cm)
Cetaceans fat blubber
are kept known can be
by a thick insulating layer of fat
as blubber
as thick as 50 cm