The observed preferences are not stable and only valid for a period of a few days.
▲ 1point prefarably loiters in the separated ‘food chamber’ mainly close to the bottom. He has this habit since about one week.
▲ For a couple of days bent also had a preference for the right side of the aquarium. She hovered calmly at a medium height next to the thermometer.
▲ They occasionally court each other.
▲ heabea joins him occasionally. It seems like heabea and forc – separated by the plexiglass pane – enjoy teasing each other
joe blow can often be found on the right side of the aquarium, close to the surface.▼