The most popular dolphin is the bottle nose dolphin.

A bottle nose dolphin  is up to nine feet long.

A dolphin can live for twenty years.

Dolphins live in social groups.

A dolphin's fin bone has five finger bones like humans!

Dolphins are very friendly. Some times if some one is drowning a dolphin  will use it's nose to  push the person to the surface to breathe

If you are swimming and you see a dolphin you know a shark isn't around.