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Skimmer porpoise | by coolislandsong24
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Skimmer porpoise

A straight on view of a skimmer porpoise skull. This bizarre porpoise has a long lower jaw, earning it the nicknames "chin porpoise" or "half-beaked" porpoise. It is currently under study. Until that's completed, that jaw will remain a mystery. Perhaps males used them in ritual combat over mates or territory, like modern narwhals with their tusks.

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Taken on April 17, 2009