List of invertebrates of California

This list of invertebrates of California lists invertebrate species (animals without a backbone) that are found in the US State of California. This list includes animals from the land, from freshwater, and from the ocean. The sequence of phyla is alphabetical.

Species that are endemic to the State of California are indicated using an, introduced species with an , and invasive species with an.

Annelida
Many of these species were described by Hulton Wood and Samuel James.

Arthropoda
Subphylum Crustacea

Class Insecta
California has over 30,000 insects in the entire state.

Chordata
Subphylum Urochordata