Photograph of a typical humpback whale pectoral fin, or flipper.
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posted on 2020-04-21, 20:27 authored by David E. Shormann, Marc in het PanhuisT1 and T4 denote the first and fourth tubercles. Image credit: David E. Shormann.
T1 and T4 denote the first and fourth tubercles. Image credit: David E. Shormann.
