That last several stockings of GC in our pond have been diploids. The reason I asked about their ability to reproduce has to do with some large cleared out areas I saw last week that look like a spawning beds, 3-4 feet across, in shallow water, very near to where our GC's prefer to hang out. To my knowlege our LMBs, BGs, and CC's shouldn't be doing any of this right now. With the wind we have here in NE combined with cedar tree lines on the north and south sides of our pond there is usually a weak counter clockwise current in the pond when the wind blows. I do know that our CC have successful spawned before so it makes me wonder if could be possible for the diploid GC's to spawn as well. If they do spawn it will definately put a twist in our weed management program. Maintaining a proper balance of aquatic weeds has been very healthy for our pond, having all of the weeds suddenly dissappear would throw the fish population way out of balance. I have heard some hearsay that diploids typically do a better job of eating vegetaion than triploids.