Invertebrates are animals that do not have a backbone or a bony skeleton. This profile explores basic facts about invertebrates including how they are classified, what they eat, where they live and the characteristics that make them different from other animal groups.
Facts About Invertebrates
Learn interesting facts about invertebrates and find out about their diversity, evolutionary history and the characteristics make them different from other animal groups.
A Guide to Vertebrates and Invertebrates
Among the most basic criteria by which animals are described is whether or not they possess a backbone. This single trait places an animal into one of just two groups: the vertebrates or the invertebrates.
Pictures of invertebrates including horseshoe crabs, jellyfish, ladybugs, snails, spiders, octopus, chambered nautiluses, mantises, and more.
The Basic Invertebrate Groups
An introduction to six basic groups of invertebrates including arthropods, cnidarians, echinoderms, mollusks, segmented worms, and sponges.