Bleher's Chilatherina

Chilatherina bleheri is one of the most impressive rainbowfish in the genus Chilatherina, collected from the vast Mamberamo River basin in West Papua. Named in honour of Heiko Bleher, a legendary fish explorer and collector, this species is a large and powerfully built rainbowfish with a bold black mid-lateral stripe running from head to tail, overlaid on a brilliant blue to blue-green iridescent body. Males develop a pronounced dorsal hump with age, adding to their imposing stature.

This species requires a spacious aquarium with excellent filtration and regular water changes. It is appreciably more territorial than many Melanotaenia species, and while not aggressive per se, it needs a large group of its own kind and sufficient space to distribute male dominance displays. The aquarium should provide plenty of open water for swimming, with dense planting at the sides and rear.

Chilatherina bleheri is rarely seen in the hobby and is a genuine collector's species. When available, it is usually sourced through specialist importers or hobbyist breeders within the rainbowfish community. It breeds in standard rainbowfish fashion but requires more space and privacy than smaller species.

Water: pH 7.0–8.0, temperature 23–28°C, moderately hard; powerful filtration and weekly 30% water changes required. Tank: Minimum 200 L; wide-open swimming space essential; dense planting at tank margins. Feeding: High-quality pellets and flake; regular live and frozen offerings of brine shrimp, daphnia, and bloodworms. Breeding: Egg scatterer on fine plants; larger spawning tank needed; males require adequate space to avoid excessive chasing. Compatibility: Peaceful but large; best with other medium-to-large peaceful species; avoid small or timid tankmates.