invertebrates — Zoology. not vertebrate; without a backbone. of or relating to creatures without a backbone.
abalones — a large mollusk of the genus Haliotis, having a bowllike shell bearing a row of respiratory holes, the flesh of which is used for food and the shell for ornament and as a source of mother-of-pearl.
cuttlefish — A cuttlefish is a sea animal that has a soft body and a hard shell inside.
