What 3 animals have no backbones?

Here are 3 animals that have no backbones (meaning they are invertebrates):

1. Octopus: These cephalopods are incredibly intelligent and have a soft body with eight arms.

2. Butterfly: These insects have a hard exoskeleton and go through metamorphosis from a caterpillar stage.

3. Earthworm: These annelids are segmented worms that play a crucial role in soil health.