For the past couple days my usually docile male Keyhole Cichlid has been going crazy. He darts around, chasing my barbs, and gathers air bubbles from the surface by the filter. He then takes the bubbles down to the gravel where he releases them. He has taken on breeding coloration but my female has not. My best guess is that he thinks he needs to oxygenate eggs but there are no eggs. Has anyone else seen this behaviour?