A close look at the bump-like knobs known as tubercles on the top of the head of a Humpback whale (Megaptera novaeangliae). Each protuberance contains at least one stiff hair. The purpose of these hairs is not known, though they may provide the whale with a sense of 'touch'; Hawaii, United States of AmericaImage #: 12548756 See More From: Dave Fleetham
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