Figure 38.—A series showing the extreme variability in dorsal fin shapes of humpback whales: ([a]) a small ridge, ([b]) slightly falcate, ([c]) triangular with a pronounced hump, ([d]) slightly rounded, ([e]) distinctly rounded, and ([f]) taller and more distinctly falcate. (Photos from northern West Indies by H. E. Winn [a, c, e] and C. McCann ; off Baja California by K. C. Balcomb [d]; and off St. Augustine, Fla. by D. K. Caldwell [f].)