Only one side is facing outwards. The other side is facing a wall. It wouldn't have mattered since he did it at night when it was all dark. Maybe when somebody turned on a light it spooked him.
Giant danios are a good dither. They'll be teacher fish and some day become food when the ATF gets big enough.
Giant danios are a good dither. They'll be teacher fish and some day become food when the ATF gets big enough.