Fish species cultivated were tilapia (Oreochromis niloticus) during aubergine production
in 2004 and eurasian perch (Perca fluviatilis) in the later experiments with tomato and cucumber. Tilapia was a natural strain imported from Lake Turkana, Kenya, perch was obtained from Percitech S.A., a Swiss company specialized in perch breeding. The fish were fed ad libitum with a swimming pelleted feed (Trouvit Tilapia Starter, 3.5mm, 45% raw protein).