Heard back from the state fish and game people regarding to what kind of fish I have. He agreed they are juvenile panfish, probably bluegill. Seems one can't buy such things and you need a permit to trap them. Of course with a fishing license you could always go out and hope to catch some. He suggested getting fathead minnows or golden shiners at a bait shop. Both seem to like fairly still water which sure describes my pond. In addition I found this on golden shiners:
"Golden shiners are omnivorous. They eat
zooplankton, insects, plants, and algae."
I wonder just how much algae the will eat. Sure could use help in that respect!
I asked about the possibility of trapping some in the other pond (if they exist) without a permit. Also even if I did have bluegill in the other pond if it would be a good idea to have multiple species anyway. Also asked how long it takes bluegill to mature given these don't seem to be growing all that fast. Will see what he has to say.
Wikipedia says:
"The growth of the bluegill is very rapid in the first three years, but slows considerably once the fish reaches maturity. Many fish reach five to eight years old, and in extreme cases, can live 11 years."
And again, this on golden shiners:
"In the southern parts of their range, golden shiners can start reproducing at one year of age; in Canada, first breeding is more commonly at three years of age." Seems like it would be quite a long time for any fish to get old enough to reproduce. So again, how did I have fish in the pond? I've never seen an adult fish in the pond and we've owned the place for 8 years. Maybe they stayed in their juvenile state? Can that even happen?