van Helden, A.L., A.N. Baker, M.L. Dalebout, J.C. Reyes, K. van Waerebeek and S.C. Baker. 2002. (Ref. 7801)
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Size / Weight / Age
Climate / Range
Subtropical; 0°N - 90°S, 158°E - 50°W
It is distinguished by its prominent melon, and the dark gray or black coloration of the rostrum. It also has a dark eye-patch, white belly and dark flippers.
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Estimation of some characteristics with mathematical models