Bill as Cecil has mentioned the LMBass should have a very distinctive black horizontal line along its body from tail to head from approx. 1" larger. Bill Cody told me a while back that the blue gill will deepened in their bodies at approx. 3/4" to 1" and you should see vertical bars along their bodies (and he was right on! Thanks Bill Cody). The dark spot on their gill will begin to show and be recognizable. In my lake the bluegill fingerling school in small numbers as did the bass but as the bass grow they became more independent. The bass are much faster swimmers and start to show their predator characteristics as they grow. In general the bluegill/bass have been growing approx. 1/32" per day or 1/4" per week during these summer conditions. Today, the bass fingerling are 4-5" and the first spawn of bluegill a little behind that. However, because bluegill can reproduce approx. ever 30 days or so during the summer I have many sizes of bluegill depending on when they were spawned 1st, 2nd, 3rd etc....? I hope this helps as I gain hands on knowledge with my new lake.

Rowly