(extinct)
Some Other Invertebrates
Some invertebrates have no hard covering (exoskeleton). Some have no legs. Some have more legs than insects, crustaceans, and other familiar invertebrates. Some invertebrates are so small that a microscope is required to see them.
There are more total and more different kinds of invertebrates than vertebrates.
Click on the X above each invertebrate to see examples and find out more information.
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| Sponge | Ameba | Bivalves | Coral | Earthworm |
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| Sea Anemone | Slug | Snail | Trilobite (extinct) |