Photo: Javier Yaya Tur / CIUDAD DE LAS ARTES Y LAS CIENCIAS from Va · CC BY 2.0 (Wikimedia Commons)
Scientific name
Delphinapterus leucas
Group
Marine mammals
Rarity
Epic
Where to see it
Cold / polar waters
Conservation status (IUCN)
Least concern
Did you know?
The beluga whale, nicknamed the canary of the sea for its wide range of whistles and clicks, is the only cetacean able to turn its head, since its neck vertebrae aren't fused together.
What defines this group — Marine mammals
Warm-blooded, they nurse their young and breathe air — the group closest to us underwater.
They breathe through a blowhole (whales, dolphins) or nostrils (seals, sea lions).
A thick layer of blubber, rather than fur, insulates them from the cold.
Many navigate and hunt by sound, using echolocation.