The Story of Freja, the World's Oldest Harbor Porpoise (Phocoena phocoena) and her Contribution to Wildlife ConservationOn 7 April 1997, a 2-year-old female harbor porpoise was caught in a fixed purse-sein net off the Danish coast. She was brought to the Fjord&Bælt in Kerteminde and placed in a semi-natural habitat, which allows for natural water and weather conditions year-round.