Across Clues:
| 2. | class of cnidarian which are only polyps- corals and sea anemones (8) |
| 4. | small skeletal element of a sponge (7) |
| 5. | cell with a flagellum in sponges, moves water and filters food (10) |
| 7. | phylum of animals without organs, tissues, or any particular symmetry (8) |
| 8. | phylum of bilateral worms with mesoderm tissue, flat body (15) |
| 9. | class of poriferans with protein spicules, "people's sponge" (11) |
| 10. | harpoon of stinging cells seen ONLY in cnidarians (10) |
| 12. | class of sponges with calcuim spicules (8) |
| 13. | unique mating ritual in free living flatworms, spear like reproductive organs tear holes in each other (13) |
| 14. | mouth part in free living flat worms, extends from the middle of its belly (7) |
| 15. | free-living carnivore, most common marine flat worms (12) |
| 16. | also known as tape worms, parasitic flat worms, longest ever found was fifty feet long inside a sperm whale. (7) |
| 17. | class of cnidarian that has alternating generations (8) |
Down Clues:
| 1. | class of cnidarian which are only polyps- corals and sea anemones (8) |
| 2. | small skeletal element of a sponge (7) |
| 3. | cell with a flagellum in sponges, moves water and filters food (10) |
| 5. | phylum of animals without organs, tissues, or any particular symmetry (8) |
| 6. | phylum of bilateral worms with mesoderm tissue, flat body (15) |
| 11. | class of poriferans with protein spicules, "people's sponge" (11) |
| 12. | harpoon of stinging cells seen ONLY in cnidarians (10) |