Hi, The Linke & Staeck book says that there is no harem forming tendency in nijsseni. Has anyone ever kept more than one female per single male in a tank? If yes, what were your observations. Thanks, Ken. ***************************** Ken Laidlaw Royal Observatory, Edinburgh Tel: 0131-668 8100 Fax: 0131-668 1130 Web: http://www.roe.ac.uk *****************************