This little bugger was really fast when in the water. He occasionally came up for air, and when I tried to slap him, he dove to the bottom. I finally got him with the net, and got a picture. He didn't fly away, and in fact acted helpless out of the water.
I keep my borates at 50, so not sure how to get rid of them other than fishing them out. This is the 3rd one I've seen this year. They also avoid the skimmer. Head to tail, about the size of a dime.