The Crustacea Class is split into smaller groups, called Orders. Below is a list of some Crustacean Orders:
Decapoda Order: Called "Decapods." Includes Crayfish, Crabs, and Shrimp.
Isopoda Order: Called "Isopods." Includes Pillbugs and Sowbugs.
Amphipoda Order: Called "Amphipods." Includes Scuds.
Cladocera Order: Includes Water Fleas.
Anostraca Order: Includes Fairy Shrimps.
Arguloida Order: Includes Fish Lice.
All of the Orders above have been split into smaller groups, called Families. Families are then split into Genera. Remember, as each group gets smaller, organisms in that group are more and more alike. Each Genus will contain individual Species.
Information on specific Families and Genera is not included on this website, but you can find out which groups a species belongs to by checking the Classification Box at the bottom of each Species Page. See the example of a Water Flea below: