Fin whale - Balaenoptera physalus This right side of the lower jaw is white; whereas the left side is dark grey. Other whales don't have this asymmetric feature. Note the double blowholes (nostrils), which indicates that this is a Mysticete (baleen whale).

Head of a Fin whale

The right side of the Fin whale's (Balaenoptera physalus) jaw is white, also note the double blowholes.

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