Which is NOT an adaptation that exploits the density of water?

Name: Which is NOT an adaptation that exploits the density of water?
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Question

Quizplus · Accepted Answer

Long, filamentous appendages do not necessarily exploit the density of water. The other choices do exploit the density of water in some way. A gas-filled swim bladder helps fish control their buoyancy in water, droplets of oil on algae help them float on the surface of water, and high percentages of fat in marine mammals help them maintain buoyancy in water.

Which Is NOT an Adaptation That Exploits the Density of Water