Aquatic predation

Aquatic predation presents a special difficulty as compared to predation on land, because the density of water is about the same as that of the prey, so that the prey tends to be pushed away. This problem was first identified by R.N. Alexander. As a result, underwater predators, especially bony fish, have evolved a number of specialized feeding me...
Found on http://en.wikipedia.org/wiki/Aquatic_predation
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