This is likely the 2nd year for those fish. The SMB you stocked looked a little bigger than 4" - more like 5". Did you measure any of them?
I did not measure, but indeed, most of them seemed to be 5-6", only about 10 of the 50 looked to be 4", and the smaller ones were a darker color, came from a different pond/tank or something...
I doubt they sell all the previous years stock in SMB, so I may have lucked out here.
