Fish break law of physics, become invisible

Oct 22, 2012 by

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Silver-colored fish, such as herrings, sardines and sprat, are breaking a basic law of physics, according to a new study published in Nature Photonics. The ability allows the fish to become invisible to predators. The researchers found that the skin of sardines and herring contain not one but two types of guanine crystal. Each has different optical properties. By mixing these two types, the fish’s skin doesn’t polarize the reflected light and maintains its high reflectivity.

The result is an optical illusion that can make the fish at times seem invisible to other marine dwellers.

Fish break law of physics, become invisible

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