Invertebrate Animals

5. animals with no backbone
9. autotrophic species of plankton
10. invertebrate animals with stinging cells
13. free swimming cnidarians that pulsate their body to move.
14. appendages that chelicerates use to eat, mate and sense their environment
16. These cnidarians have an umbrella shaped body and swim freely.
18. the second largest phylum of animals, most are found in aquatic environments
19. a crustaceans exoskeleton
20. A cup-shaped tubular cnidarian with a mouth and tentacles at one end and a sticky basal disc for attaching to hard surfaces at the other end.

1. flipper like appendages that help crustaceans swim
2. when digestion happens inside of cells instead of inside a digestive system (i.e. in a sponge)
3. appendage near the mouth of the crustacean that helps it crush its food
4. These mollusks have feet that are divided into sucker-bearing arms, which are used to catch food
6. largest phylum of the Animal kingdom (10 million species)
7. this crustacean is a keystone species in the ocean environment
8. sessile cnidarians with soft bodies and a hard outer coating for protection
11. invertebrate animals with no germ layers & no nervous, digestive or circulatory system
12. a feature of the echinoderm, a system with a series of canals and tubes used for circulating nutrients, moving and capturing food
15. layer of soft tissue that wraps around the organs of a bivalve
17. heterotrophic species of plankton