Vertebrate: An animal with a backbone and a nerve column (spinal cord). Invertebrate: An animal lacking a skeleton. ... Live animals, such as: anemones, barnacles, snails, crabs, crawfish, millipedes, crickets, etc. [These are flexible, but you want representatives of animals with and without exoskeletons.]

Is a barnacle an invertebrate?

Barnacles are arthropods, or invertebrate animals with exoskeletons. Invertebrates are the largest animal phylum, comprising about 1 million species. ... Barnacles belong to the infraclass Cirripedia, meaning “curl-footed” in Latin, in the sea-dwelling subphylum Crustacea, calling crabs, shrimp and lobsters close cousins.

What animal has no backbone?

Sponges, corals, worms, insects, spiders and crabs are all sub-groups of the invertebrate group - they do not have a backbone. Fish, reptiles, birds, amphibians and mammals are different sub-groups of vertebrates - they all have internal skeletons and backbones.