Hi everyone attention to this question! I found a doubt that some kind of fish can endure low temperature such as shrimp and Goldenfish.After freeze, it can be alive for a long time.If any one focused this strange phenomenon?
It's due to the presence of antifreeze proteins in the fish's blood - the proteins have been used as the basis of some cryoprotective agents for cell and tissue cryopreservation.
Glicopeptides and antifreeze peptides bond to the ice crystal and prevent its further increase, dropping the freezing point of blood and leading to the thermal hysteresis, a phenomenon that freezing point of the water in ice is over one degree higher than that of water in the plasma of blood. Fish of the same species, e.g., cod, from colder waters can produce even 50% more glycopeptides than those from the warmer areas. See Goddard SV, Kao MH & Fletcher GL (1999) Can. J. Fish. Aquat. Sci. 56: 1991-1999
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