I guess the first place I ever fished was similar to a stock pond. It was solid with Crucians. The farm owner didn’t know how they got in there and assumed they’d been there since the year dot. You could feed a mashed loaf and scoop them out with a landing net. Just goes to show that in the right environment Crucians will thrive. Wish I had some Crucians nearby now. It’s sad they’ve become so rare.