Sneaky's Daily Did You Know - Monsters of the Deep

A Whale's penis is called a dork and can extend up to 10ft. But it is the humble barnacle which has the largest penis of any animal in the world in relation to size. The male barnacle is able to extend it to the nearest female on his chosen rock.

Some of the biggest whales - including the humpback, blue and minke - don't have any teeth.

A Blue whale's heart beats just nine times per minute.

Since a whale's eye ball is fixed, it must move its entire body to shift its line of vision.

A sperm whale's brain is six and a half times larger than a human brain.

A blue whale weighs 90 million times more than a pygmy shrew.

A blue whale eats five tons of krill, which are tiny crustaceans, every day.

Whales can communicate with each other over a distance of 700 miles.

Fully-grown whales eat three tons of food a day.

When it is born a baby blue whale weighs approximately the same as a fully-grown hippopotamus.