Marine Animals

3. an animal with a spine/backbone
5. in the Cnidaria phylum; is not sessile
6. a form of asexual reproduction in which an organism grows directly from its parent
7. an animal with no backbone
9. a sessile organism; in the phylum Cnidaria
11. the characteristic of an animal, having the ability to heat up and conserve heat in the body
12. eggs that contain amnion
13. the gland in mammals that allows for lactation
17. body parts are arranged on opposite sides of a median axis; has two identical halves
18. when a crab, for example, sheds its shell it__
19. the characteristic of an animal animal that lives on the seafloor
20. having both masculine and feminine reproductive organs

1. instead of blood, the body circulates water through it.
2. connective tissue that holds the limbs and other parts of the body together
4. a hard layer of protection possessed by invertebrates
8. arrangement of the body based on a central axis
10. an organ that develops in the uterus during pregnancy; provides oxygen and nutrients to the unborn child
14. absence of symmetry
15. the characteristic of an animal, having to rely on an external heat source
16. an organ that allows an animal to stay bouyant