Sustained Swimming Speeds of Dolphins

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Science  25 Nov 1960:
Vol. 132, Issue 3439, pp. 1550-1551
DOI: 10.1126/science.132.3439.1550


Observations of fout large groups of dolphins suggest that they are able to swim at a sustained speed of 14 to 18 knots. The blackfish are able to maintain speeds of about 22 knots, and one killer whale seemed able to swim somewhat faster. This implies that the apparent coefficient of surface friction remains approximately constant for dolphins from 6 to 22 ft long, as is the case for rigid bodies.