I really dont think there are any blue gill. Water clarity is pretty good and you can see the LMB sometimes and Ive never seen a bluegill. Previous owner didnt say anything about bluegill. Just that they pulled some of the catfish out. Water temps I am not sure yet. I have been in some deeper parts of the pond during the hot months and it didnt feel particularly cold to me. To the point I thought it was strange that a spring fed pond would be so warm. I have even considered the possibility of it being overpopulated up until recently and some sort of massive fish kill taking place where the only fish that survived were small bass. I know a lot of time the small bass point to an overpopulation issue but fishing in this pond certainly doesn't feel like there are too many fish.