Entangled right whale freed

This 6-year-old right whale was cut free from ropes that entangled him by the Campobello Whale Rescue Team in the Bay of Fundy off the coast of New Brunswick.

Sighting of Rare Whale - the Omura

A population of Omura's whales have been discovered living near Madagascar in the Indian Ocean by whale researchers. This is the first time these whales have been seen in photos or video. Leading the study is Dr. Salvatore Cerchio from the New England Aquarium and Woods Hole Oceanographic Institution.

Dolphins surfing!

Spectacular display of dolphin surfing the waves at Wategos Beach, Byron Bay, Australia. Incredible original footage by Sean O'Shea Art.

Whales give dolphins a lift!

Woman wakeboarding with dolphins

Dolphin assisted fishing

In Laguna, a Brazilian city in the southern state of Santa Catarina, a phenomenal collaboration has developed between a pod of bottlenose dolphins and the local fishermen. At certain times of year the dolphins drive fish towards fishermen who stand waiting in shallow waters near the beach. When a dolphin rolls over, the fishermen take this as a sign to throw out their nets. The escaping fish become a meal for the dolphins.

The dolphins were not trained for this behavior; the collaboration has been going on since at least 1847.

This clip was taken from the Human Planet episode "Oceans - Into the Blue" on the BBC.

Mama dolphin whistles to baby in womb

Dolphins are known for their sophisticated communication skills. Bella, a late-term, pregnant dolphin at Six Flags Discovery Kingdom in Vallejo, California, was recently discovered vocalizing her "baby whistle" to her unborn baby.

This signature whistle is used to imprint onto their babies. Dolphins also use it to announce themselves when they come in contact with new dolphins, much in the way a person uses one name throughout their life.

Bella did give birth to a healthy boy. Immediately, after taking its first breath the baby repeated its signature whistle.

To hear the whistle, click here.