1. Insects: Insects, such as ants, bees, butterflies, and beetles, are invertebrates and do not possess a backbone.
2. Spiders: Spiders, along with other arachnids, lack a backbone and instead have an external skeleton.
3. Worms: Various types of worms, such as earthworms and flatworms, do not have a backbone.
4. Mollusks: Mollusks, including snails, clams, squid, and octopuses, are invertebrates without backbones.
5. Jellyfish: Jellyfish, along with other cnidarians like corals and sea anemones, do not have a backbone.
6. Sea urchins and starfish: These echinoderms have a unique radial symmetry and lack a backbone.
7. Crustaceans: Crustaceans, such as crabs, shrimp, and lobsters, are invertebrates with an exoskeleton and no backbone.
8. Centipedes and millipedes: These arthropods have elongated segmented bodies and lack a backbone.