What animal do not have a spine?

mice and that is all i can think of.sorry........

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Mice, rats, and other vertebrates- including fish, mammals, amphibians, reptiles, birds, primates, rodents and marsupials- all have spines.

There are many invertebrate animals (spineless) including protozoa, annelids, echinoderms, mollusks and arthropods.

-Shiloh