Answer:
Though desert men once called me God, today men call me mad. For I wag my tail when I am angry. And growl when I am glad.
Known as a great deceiver, It is evil's incarnation, Once used for veneration, The root of all procreation. All you can do is shiver, When it begins to slither.
A mysterious, fantastic creature, It has one defining feature, And for humans at their worst, In their eyes it's just a horse
They swim around in schools or pods and they are related to whales
I am a animal i have sharp teeth i am the of the forest
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.