What Are the Eight Phyla of Invertebrates?

By Staff WriterLast Updated Mar 25, 2020 11:25:34 PM ET

The eight major phyla of invertebrates are Porifera, Cnidaria, Platyhelminthes, Annelida, Nematoda, Arthropoda, Echinodermata and Mollusca. There are also minor phyla. Most animals are invertebrates, and most of those are arthropods.

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