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Marine Biology Vocabulary

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Marine Biology Vocabulary Ch.8

1. Vertebrates- having a backbone or spinal column 2. Demersal-living or found near or in the deepest part of a body of water 3. Bony fishes-any fish of the class Osteichthyes, characterized by gill covers, an air bladder, and a skeleton composed of bone in addition to cartilage. 4. Operculum-the gill cover of fishes and amphibians. 5. Fin Ray-hornlike, cartilaginous rods which form the skeleton of the fins. 6. Swim bladder- air bladder 7. Chromatophores-a cell containing pigment, esp. one that through contraction and expansion produces a temporary color 8. Structural colors- pigmentation in animals. 9. Iridophores-type of pigment cell found in the integument and certain deeper tissues of lower animals. 10. Warning coloration-a bold, distinctive pattern of color characteristic of a poisonous or unpalatable organism. 11. Cryptic coloration-coloring that conceals or disguises an animal's shape 12. Disruptive coloration- one that disrupts its surroundings to escape. 13. Countershading-the development of dark colors on parts usually exposed to the sun and of light colors on parts usually shaded. 14. Myomeres-The segment within a metamere that develops into skeletal muscle. 15. Gill rakers-one of a series of stiff projections along the inner margins of the branchial arches that prevent food particles from passing through the branchial clefts. 16. Gill arches-branchial arch in a fish type being. 17. Grazers-animals that eat small portions throughout the day. 18. Spiral valve-series of crescentic folds of mucous membrane somewhat spirally arranged on the interior of the gallbladder. 19. Cloaca-a similar cavity in invertebrates. 20. Gas exchange-The diffusion of gases from an area of higher concentration to an area of lower concentration 21. Spiracle-a

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