There are many kinds of Animals, but the three basic types are the Straight-Snout, Zig-Zag Snout, and the Solid-Color.
Straight-Snouts won't always have a Mimic counterpart while Zig-Zag Snouts will. Solid-Colored Animals do not have mimic counterparts.
Mimics are aggressive look-alikes of Animals. Mimics need to eat, drink, and breathe(unlike Animals) and the only visible difference is that mimics have a mouth.