invertebrate As a command 29 categories below invertebrate Narrow by mollusc 9 insect 6 crustacean 4 arachnid 1 lobster 1 arachnid 1crustacean 4insect 6lobster 1mollusc 9abaloneantbeebutterflyclamcocklecoralcrabcricketflyjellyfishmosquitomusseloctopusoysterprawnrock-lobsterscallopsea-cucumbersea-urchinsnailspidersquidworm