The varying patterns on the tail flukes are sufficient to identify individuals.

A faded Christmas ribbon was dangling from the tail flukes of one the dolphins.

The tail flukes are triangular and, like the flippers, pointed.

The tail fluke is broad (up to 40% of body length).

Strong tail flukes held up her head, and the skin under her face was rough as bark.

The broad, centrally notched tail flukes never break the surface.

It surfaces in a rolling fashion and lifts its tail fluke clear of the water only for a deep dive.

The tail fluke is on average 46 cm in width.

They then slap the ball with their tail flukes, either stunning or killing up to 10-15 fish at a time.

Sea lions are killed by head-butting or after a stunning blow from a tail fluke.