A pair of my minnows swimming backwards in tandem, shaking their tails in tandem and flaring their fins in tanden. Bringing their rear sections close to each other, but not actually making contact. A courtship dance? Anyone else see this? I notice they also back up, in tandem, when then see their reflections in the glass. Only one pair is doing all of this. Neat to watch.

-- mermaidwannabe