The fish Pacu, or Ball-cutter, found in Swedish Waters

True story, but the news does not really affect the risk at sea in Swedish waters, not even on/in Motala ström:
A close relative to the Piranha, the Pacu, has now been found in Swedish waters reports Swedish public television. The fish was caught by a group of anglers in Motala ström in southern Sweden. The probable cause is that the fish is released aquarium fish.

The Pacu has been reported to bite of parts of male swimmers’ scrotums and are therefore sometimes called Ball-cutters.

(A true story is not always relevant)