Invertebrates are animals without a backbone or a spinal column.

Cuttlefish: It's cells make an optical illusion which allows it to change color in a wink. Predators, watch out for this!

YouTube Video

The Snail: The evolved with no predator and that made their species weak.

YouTube Video

The Giant Clam: They have hundreds of eyes on them!
Subpages (1): Vertebrates