Invertebrates!

3. a water arthropod with gills for breathing, antennae, eyes and 5 or more pairs of legs
5. a beautiful coelenterate colony made from a mound of individual polyps
8. parasitic worm that lives in cows, pigs, dogs and cats (and also humans)
9. breathing holes in the sides of an insect's body
12. a skeleton on the outside of an arthropods body
15. a type of coelenterate in which Nemo the clownfish once lived
17. an invertebrate that breathe with feet, has radial symmetry and an internal skeleton
19. symmetry in which the body parts are arranged in a circle
22. animal with stinging tentacles and radial symmetry
23. invertebrate with a soft body and (often) a hard shell

1. symmetry in which there are two similar halves
2. an animal without a backbone
4. largest phylum of invertebrates, includes crustaceans, arachnids, millipedes and insects
6. a mollusk which filters water and has two shells
7. animal which lives in or on another organism and draws nutrition from it
10. this arthropod has one pair of legs per body segment and is a predator
11. segmented worm with two separate openings for food and waste and several hearts
13. animal with a soft body and without organs
14. an arthropod with eight legs, two body segments
16. whip-like structures that circulate water inside a sponge
18. a mollusk with tentacles, large eyes and teeth
20. an arthropod with six legs and three body parts
21. a floating coelenterate with long stinging tentacles