Contribution to the ethology of Simochromis diagramma (Günther) (Pisces, Cichlidae)

The behaviour of Simochromis diagramma, a cichlid fish of Lake Tanganyika, is studied. Seven colour patterns were distinguished, corresponding to well-defined behaviour displays or moods. A description of the aggressive behaviour is given for threatening, fighting and feigned attacking. Two forms of aggression inhibiting displays are described. Further, we payed attention to sexual behaviour, parental care and the behaviour of the yound. Simochromis diagramma is a maternal mouth breeder.