Watch a blue whale blow water in the video below: The blue whale possesses a small dorsal fin near the rear of its body and pectoral flippers (up to 20 feet long) to aid its maneuvering.

Whale shark with injury to the dorsal fin, likely to be caused by collision with a vessel. Credit: Gonzalo Araujo ...

Captive whales don't have enough space to reach these speeds. Ultimately, the curved dorsal fin is still a mystery. Curved, or not, the orca's giant fin is a beacon to all, this apex predator is a ...

The fin whale - known as the "greyhound of the sea" for their speed - is the world's second-largest animal after the blue whale. It is the second one to wash up in Cornwall this year.