Animal

John Lennon sang about being this toothy creature.

related riddles

What has armor but is not a knight, snaps but is not a twig, and is always at home even on the move?

A mysterious, fantastic creature, It has one defining feature, And for humans at their worst, In their eyes it's just a horse

I am white and I am black. I am fast and I am not fat. I confuse many people with my style. Who am I?