Pond Boss Forums INTRO Questions & Observations New pond owner, where to start?

Happy Thanksgiving all!

I was at the new property Yesterday and the kids went off doing their thing and next thing I know they said they had "found" some minnows. I had them show me and near the pond intake (there's a water retention pond up from our pond at the nearby high school which when full overflows into our pond) there were tens maybe hundreds of thousands of minnows. Any idea why they were all bunched up here at this end of the pond in the shallows like this? It almost looked like they were trying to swim "upstream". Also, what species of minnow was this? They were mostly in the 2-4" range with a couple I saw that might have gone 5" or 6". We had recently had some rain so there was a small amount of water flowing from the upper pond to our pond.