This video is called Harbour Porpoise Species Identification.
Tuesday, September 30th, 2014
Around half past ten in the morning thirty volunteers departed aboard eight ships in line to the eastern part of the Oosterschelde. Nowhere else in the world the number of porpoises is counted in this way. During the scan, there was not much wind, so the animals were easy to find. A total of 34 porpoises were observed, including at least three mother and calf pairs.
Harbour porpoises in Belgium: here.