To survive, some freshwater fish breathe air, 'walk' over land

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SINGAPORE - Freshwater fishes give new meaning to the phrase "survival of the fittest", with some developing the ability to breathe air and others, to move across land in search of new freshwater bodies.

They might look duller compared with their flashy cousins from the marine realm, but even that is a survival trait - they often take on the colours of their surroundings as it helps them to avoid being eaten by predators above water.

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