• Biology,  Zoology

    SIGHT IN FISH

    While water is a better medium for the transmission of sound than air it is a much worse medium for the transmission of light. Basically, water absorbs light. This means that the further a ray of light travels through the water the weaker, or more attenuated it becomes. While we who live in the air can often see for several kilometres, sometimes even more than 20 km, a fish is lucky if it can see for 50 metres and generally it can see for far less than this. In muddy, algified or turbulent water visibility can often be measured in mere centimetres. Furthermore, because water absorbs light, the amount of…

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