marine animals

2. located on the chest,made up of connective tissue, fat, and tissue that contains the glands that can make milk.
6. shed old feathers, hair, or skin, or an old shell, to make way for a new growth
8. the free floating form in a cnidarians life cycle
9. the sessile form in a cnidarians life cycle
10. a tough elastic tissue composing most of the embryonic skeleton of vertebrates
11. arranged around a central point, has more than one line that divides the organism into two mirror images.
13. a form of asexual reproduction in which a new individual develops from some generative anatomical point of the parent organism.
15. the lowest ecological zone in a water body, and usually involves the sediments at the seafloor.
16. warm-blooded animals,those that maintain a constant body temperature independent of the environment
17. lack of equality or equivalence between parts or aspects of something; lack of symmetry.
18. the organ in mammals that forms inside the mother's uterus, nourishes the unborn baby, and is pushed out of the mother after the birth of the baby.
19. an animal lacking a backbone, such as an arthropod, mollusk, annelid, coelenterate, etc.
21. cold-blooded animal,ny animal whose regulation of body temperature depends on external sources

1. the tube feet being operated by hydraulic pressure within the vessels.
3. a gas-filled sac present in the body of many bony fishes, used to maintain and control buoyancy.
4. the condition of having both male and female reproductive organs.
5. the property of being divisible into symmetrical halves on either side of a unique plane.
7. are animals with a backbone inside their bodies
12. An air-breathing egg characterized by a shell and extraembryonic membranes.
14. an internal skeleton, such as the bony or cartilaginous skeleton of vertebrates.
20. an external supportive covering of an animal (such as an arthropod)