"Water is about 800 times more dense than air, and 50 times more thick and viscous. Although the chemical formula of water is H20, it actually contains about 95 percent less available oxygen than air does. All the organisms that live in water have to deal with those chemical and physical properties in some way."
- Dr. Melanie L. J. Stiassny, Curator of the Milstein Hall of Ocean Life

The resources below investigate the characteristics of water and how marine life forms adapt to them.

		Journey to the Bottom of the Sea Activity for grades 3 through 8 Did you know sound moves five times faster in water than in air? Or that cleaner fish have "cleaning stations" where they remove parasites? Deepen your knowledge with this ocean life challenge.
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		Let's Talk with Ian Harrison about How Marine Animals Breathe Article for grades 6 through 12 When in comes to breathing under water, marine organisms breathe in different ways. Some absorb oxygen through their skin, some rely on gills, and others gulp air into their gas bladders.
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