Facts about dolphins

Dolphins are marine mammals which means they breathe air and live in the oceans. There are almost 40 species of dolphin.
They vary in size, the smallest is a Maui's dolphin which is about 1.2m long and 40kgs. The largest of the dolphin family is the Orca or killer whale which can grow up to 9.5m and 10 tonnes in weight.
Dolphins are found all over the world, mostly in shallower seas. They are carnivores and eat mostly fish and squid.
Dolphins are very clever. A group of dolphins is called a 'pod', the males are called 'bulls' and the females are called 'cows'.