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Sunday, 26 October 2014

Dolphin

The name 'dolphin' comes from the Ancient Greek delphis meaning "with a womb", because it was first thought to be a fish with a womb. It is now known to be a mammal.

A dolphin named Pelorus Jack regularly guided ships in New Zealand through treacherous waters until his disappearance in 1912.

In Laguna, Brazil, dolphins herd fish towards local fishermen and then signal the fishermen to throw their nets. The dolphins feed on the escaping fish. They were not trained for this behavior, the collaboration has been going on at least since 1847.


Dolphins don't automatically breathe, they have to tell themselves to breathe.

The dolphin that played Flipper on the TV show committed suicide by refusing to breathe.

Air can be forcefully expelled from a dolphin's blowhole at a speed of 100 mph.

Dolphins can stay up to 15 minutes under water, but they cannot breathe under the water.

Dolphins sleep in the water with one eye open to watch for predators while they sleep.

Dolphins can swim at speeds of up to 37 mph.

Dolphins that are tagged by scientists swim 11 percent slower because of the drag from the object on their bodies.

The brain of a dolphin is like a human brain in size and development.

Dolphins shed the top layer of their skin every two hours.



Male dolphins are called "bulls", and females "cows".

When dolphins give birth, the babies come out tail first.

Male dolphins have been known to separate female dolphins from their families and deny them food until they agree to mate.

Dolphins have "bromances" in which two males may pair up for as long as 15 years and help each other hook up with females.

Dolphins can recognize the distinct whistle of their old friends even after 20 years of being separated.

Dolphins can recognize themselves in the mirror, and they love to admire themselves.

Humans and dolphins are the only species that have sex for pleasure.

The US Navy has 75 trained dolphins to detect enemy swimmers and underwater mines.

Though killer whales are considered whales by most people, they are actually members of the Delphinidae (dolphin) family.

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