Page "Blue whale" Paragraph 13

The flippers are long.

The upper sides are grey with a thin white border ; the lower sides are white.

The head and tail fluke are generally uniformly grey.

The whale's upper parts, and sometimes the flippers, are usually mottled.

The degree of mottling varies substantially from individual to individual.

Some may have a uniform slate-grey color, but others demonstrate a considerable variation of dark blues, greys and blacks, all tightly mottled .< ref name =" factsheet ">