Dolphins
By Stella

A dolphin can live up to twenty years. There are thirty different species of dolphin in the world.

Dolphins are aquatic mammals. They breathe through a hole in the top of their heads.

Out of all the dolphins on the planet New Zealand must have chosen only four and they are the Hectors, Bottle Nose, Dusky and the Common Dolphin.

A dolphin catches its prey by using sonar. Because water transmits sound very well more than four times as fast as in air, sonar is the best way to find food.

Dolphins do have ears but don't seem to use them. Being warm blooded takes a lot of food to sustain energy. Not surprisingly they spend most of their time hunting.