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Fish showing white gills
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©Copyright P. Ward - picture taken 1985 / 86
Ice fish have no respiratory pigment - usually the red haemoglobin that gives other vertebrates red blood. There isn't an alternative chemical instead, there just isn't anything that does the same job. Their blood is a clear liquid and gives them an eerie ghostly look particularly of the gills which are white rather than the bright red of other fish.
Oxygen like most gases dissolves better in cold water and this characteristic along with a blood volume larger than other fish means that the ice-fish can get along fine without a carrier molecule like haemoglobin for their oxygen. They will benefit from having less need for iron (found in haemoglobin) and not needing to use energy and protein to make a respiratory pigment.
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|This picture is one of a collection assembled in
the 60th anniversary of Signy Island
Base: 60°43'S 045°36'W. Thank you to those who sent their treasured memories of their time in
Antarctica and allowed them to be made into a commemorative cd
and then placed here on the web.
weekend was 14-16 September 2007.
The reunion weekend was 14-16 September 2007.
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