Showing posts from March, 2014

What Are Sharks Aware Of?

More and more divers are meeting sharks for the first time, and wondering, “What do they see when they pass, gazing at us gazing at them?”
Sharks have a very different set of senses than we do, yet the eye-sight of the free swimming species is good, so passing sharks who have approached to look at you, are really seeing you. But you may have the impression that they are using senses other than their eyes most often, and indeed, apart from our shared good eye-sight, it is impossible for us to imagine how sharks experience their liquid realm.
Sound and vibration are very important to them. Sound travels far in water, spreading out in a uniform spherical pattern, and sharks hear well. They are particularly sensitive to low-frequency vibrations, such as those caused by movement in the water, and crashing waves. And they can detect pressure waves with the sense organ called the lateral line.
The lateral line is found in fish, sharks, and some amphibians, and is made up of a series of rece…