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Fin whale (Balaenoptera physalis) in Antarctica, with the typical bright lower jaw visible.

File: DSD3647.jpg

Title: Fin whale (Balaenoptera physalis) in Antarctica, with the typical bright lower jaw visible.

Fin whale (Balaenoptera physalis) in Antarctica, with the typical bright lower jaw visible.

Credit: Gerhard Hüdepohl / atacamaphoto