"Rosati's cichlids" refers to Fossorochromis rostratus, a large African cichlid native to Lake Malawi. A breeding male of this species undergoes a dramatic physical and behavioural transformation to attract mates.
Characteristics of a Breeding Male
Vibrant Coloration: While juveniles and females are silvery with three black spots, a mature breeding male develops a stunning deep metallic blue or iridescent green-blue body.
Size: Breeding males are significantly larger than females, typically reaching over 20–30 cm (8–12 inches) in length.
Territorial Aggression: During spawning, the male becomes highly aggressive, establishing a territory and chasing away other fish to protect his nesting site.
Nest Building: Males are "sand bower builders," meaning they dig large depressions or pits in the sandy substrate to entice females to spawn.
Breeding Behaviour
Courtship Dance: The male attracts a female to his nest through a series of "dances," involving vibrating his fins and displaying his intensified colours.
Spawning Process: Unlike many other Malawi cichlids, the male F. rostratus lacks egg spots on his anal fin.
Polygynous Mating: In a colony, often only one dominant male will display full breeding colours and mate with multiple females.
SKU: RBM
