The cod icefishes or nothothens are the family Nototheniidae of acanthopterygian fishes. They are traditionally placed in the perciform assemblage together with their relatives, but like every lineage in the `Perciformes`, their actual relationships are not yet determined with certainty. They are largely found in the Southern Ocean and off the c.....
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http://en.wikipedia.org/wiki/Nototheniidae
(from the article `marine ecosystem`) Marine organisms have evolved a wide variety of unique physiological and morphological features that allow them to live in the sea. Notothenid fishes ...
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http://www.britannica.com/eb/a-z/n/58
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