22. Tail slapping humpback whale with water cascading off the wavy trailing edges of its powerful tail. The tail fin can be up to a third of the humpback’s body length. Varying patterns on these flukes allow researchers to distinguish individual animals and photo ID catalogues of the different populations are added to each season. Tail lashes can also be part of surface active groups fighting for a female.

Humpback Whale, Tonga