posted on Sep, 16 2007 @ 10:19 AM
Originally posted by Sadet
So,I am reading about the Coelacanth being caught in more and more places after being thought extinct. Is it possible that a bunch of them were
caught in the polar ice when it formed,and now that it is melting they are being released? Fish are cold-blooded,and can survive being frozen
Being cold-blooded has nothing to do with being able to be frozen down. For that to happen, the cells in the creatures has to have developed
anti-freezing proteins and specialised lipids in their cell-membranes, to assure that cells doesnt explode, when frozen. Water cooled down below 0°C,
turns into ice-crystals and widen, thereby expanding cells.
For a creature to be able to be frozen down, it has to be very highly developed in this way, and it is not many creatures that are able. On top of
that, those that are capable of it, tend to die after relatively few years if they arent unfrozen.
Fish that have these special proteins and lipids, are usually those that live in very cold water, or at very low levels, such as several kilometers
under the surface.