Why don't fish freeze?

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therodgers21

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Why don't fish freeze?
« on: 07/09/2008 14:44:37 »
therodgers21  asked the Naked Scientists:

Hi,

How can fish not freeze solid in Antarctic water? Can't we use it?

Love the podcasts & hope you had a great vacation.
 
From Silicon Valley ; where denial is sold by the share,
Bruce Rodgers

What do you think?

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blakestyger

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Why don't fish freeze?
« Reply #1 on: 10/09/2008 19:27:11 »
We do use it!

Antarctic and Arctic fish don't freeze at the very low water temperatures found there because their genomes posses a gene that is expressed as glycoprotein, an anti-freeze protein, in their blood plasma. This depresses the freezing point of their blood in the same way that ethylene glycol works in an engine block.

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Offline Evie

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Why don't fish freeze?
« Reply #2 on: 10/09/2008 21:51:29 »
And also genetically engineered tomatoes that are frost-resistant!
====================================================
"There are more things in heaven and earth, Horatio,
Than are dreamt of in your philosophy."
Hamlet
Act I, scene 5