Melanotaenia fasinensis

Reddish flank stripes contrast with a blue upper body, with a patch visible behind the pectoral fin.

Reddish flank stripes contrast with a blue upper body, with a patch visible behind the pectoral fin. Colour changes with condition; body depth alone cannot determine sex.

Adult length

Up to 12 cm (standard length, without the tail fin)

Natural habitat

Native to the Fasin River on the Bird’s Head Peninsula in West Papua, Indonesia.