* Goldfish do not have backbones. They are fish, and fish belong to the group of animals called vertebrates, which means they have a spinal column made of bones. However, their backbone is different from that of mammals, birds, and reptiles. It's more flexible and allows them to move through water efficiently.
* Earthworms do not have backbones. They belong to a group called invertebrates. Instead of a bony backbone, they have a hydrostatic skeleton, which means they use internal fluid pressure to maintain their shape and movement.