1. Cnidarians Octavio’s Book Cnidarians

2. Cnidarians are Invertebrates (no backbones)

3. The hydras and jellyfishes are cnidarians

5. The jellyfish can be a few inches in width and the largest can be over 6 feet

7. Cnidarians are aquatic animals, mostly marine

8. The anemone and the red coral are cnidarians

10. The body of a cnidarians is a sack with an opening.

11. This opening is surrounded by many poisonous tentacles

12. The Portuguese Man of War is a colony of poisonous cnidarians

14. Some cnidarians have the Medusa form, and living free

15. In the medusa form the tentacles dangle down

17. The sea nettles have medusa form

19. Others cnidarians have the Polyp form, and living in colonies

20. Polyps form is when the cnidarians are connected to the bottom

22. The brain coral and the pillar coral have the polyps form

24. The coral polyps form reefs that can stretch for thousand of miles

25. The largest coral reef is the Great Barrier Reef at the northeast of Australia

27. The coral reef are the home of an amazing variety of animals

28. There are more than 11,000 species of Cnidarians