3. A cnidocyte is a stinging cell found in the tentacles of cnidarians, inside the cnidocyte is a nematocyst. The nematocysts are what sings the prey of cnidarians, nematocysts shot out cnidocytes when they are triggered and spear the prey. 4. Anemone and coral polyps both belong to the class anthozoans, they both have stinging tentacles. The difference between the two are sea anemones move and coral remain sessile. Also, coral has a hard skeleton compared to a softer one of a sea anemone. 5. Hydras are polyps, the different thing about them is they move by doing somersaults with their tentacles. 6. The three types of cell layers in a cnidarian are the outer epidermis, the inner gastrodermis, and the jelly like substance found in the middle, the mesoglea. 7. Coral is composed of calcium or limestone, corals are part of the class anthozoans, they are polyps, and remain sessile almost their entire life. The way coral reproduces is by budding. Coral has an osculum in the middle between their tentacles.
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- Fall '15
- Cnidaria, Gabi McAllister