Reports

Temperature Tolerance of Some Antarctic Fishes

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Science  14 Apr 1967:
Vol. 156, Issue 3772, pp. 257-258
DOI: 10.1126/science.156.3772.257

Abstract

Three species of Antarctic fishes which live in constantly near-freezing waters have a markedly low upper-lethal temperature of 6° C ; this is the lowest upper-lethal temperature reported for any organism. The fishes survive supercooling to —2.5°C. Data on brain metabolism in vitro support the hypothesis that the central nervous system is a primary site of thermal injury.