I have not seen signs of fish (or perhaps I just could not catch any). What I do have is an abundance of frogs and tadpoles. If there are fish, they didn't bite nor did they show interest in the grasshoppers I threw into the pond to lure them. My assumption is there could have been a fish kill at some time. This pond is fed by runoff and has no regular inlet of fresh water. I do have an aerator ready to install in anticipation of stocking fish.