Dolphin

Although a dolphin lives in the sea it is not a fish.
It is a mammal. It is in many ways, therefore, like a human being.
Dolphins have a simple language. They are able to talk
to one another. It may be possible for man to learn how to talk to dolphins.
But this will not be easy because dolphins cannot hear the kind of sounds man
can make. If man wants to talk to dolphins, therefore, he will have to make a
third language which both he and the dolphins can understand.
Dolphins are also very friendly toward man. They often
follow ships. There are many stories about dolphins guiding ships through
difficult and dangerous water