This is a harbor porpoise video.
According to Dutch NOS TV, thirty harbour porpoises live in the Dutch Oosterschelde estuary; including five calves. Later this year, it will be investigated whether these porpoises will swim through the partly open Oosterschelde storm surge barrier to the North Sea.
See also photos here.
Update May 2010 here. August 2010: here. November 2010: here. September 2013: here.
Oosterschelde porpoises catalogue: here.
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