fish that can survive for months in a tree


	fish that can survive for months in a tree

german

10-21-2007 10:07 AM

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tags:

fish, research, nature

1 Comment |

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10-22-2007 10:54 AM

Jaycer17

Wonders never cease... And they have to "curb their aggresion..." Cool!

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Scientists have discovered that it spends several months of every year out of the water and living inside trees.
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Hidden away inside rotten branches and trunks, the remarkable creatures temporarily alter their biological makeup so they can breathe air.
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The latest discovery was made by biologists wading through swamps in Belize and Florida who found hundreds of killifish hiding out of the water in the rotting
branches and trunks of trees.
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Although the cracks inside logs make a perfect hiding place, conditions
can be cramped. The fish – which are usually fiercely territorial – are forced to curb their aggression.
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Their gills are altered to retain water and nutrients, while they excrete nitrogen waste through their skin.
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These changes are reversed as soon as they return to the water.
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Killifish can develop both female and male sexual organs, and fertilise their eggs while they are still in the body, laying tiny embryos into the water.
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