What Are The 4 Main Types Of Invertebrates?
What Are The 4 Main Types Of Invertebrates? Insects, annelids, mollusks, echinoderms, protozoa, crustaceans, and arachnids are all invertebrates. Invertebrates share four common traits: They do not have a backbone. They are multicellular. What are the 5 kinds of invertebrates? The Invertebrates unit explores six groups of invertebrates— poriferans (sponges), cnidarians (such as sea jellies