At the back of our house is a small water way (part of the water management system in the area). In the past days we heard splashing we couldn’t determine the source of. Today we saw the likely source swim by, a big fish in a small body of water.
Not sure how it got there, maybe when the water authorities pumped water from the nearby IJsselmeer into our area, during the recent weeks of draught. Not sure if it could get out again by itself (the available passage seems too small for it).