I noticed it in my caged fish first - but I'm only feeding them every other day - but was super disappointed at their lack of weight gain - but blamed myself. I can't get out there every day living offsite as you know.
Then I started noticing it in fish caught around my dock - some very nice 9" BG which are huge for my pond were pinch bellied, then even smaller fish. This Winter it's even worse. Popped 2 BG over 10" with pinched bellies, but even the 4-6" BG too. Something going on...despite my harvest and feeding, these BG aren't getting enough nutrients.