Red Dwarf Rasbora

About

The emerald dwarf rasbora (Microrasbora rubescens) is a petite fish from one of Southeast Asia's most celebrated bodies of water. Lake Inle in Myanmar's Shan State, where it inhabits ponds, marshes, shallow pools, and slow-moving streams. Despite being sold under a rotating cast of trade names including 'red dwarf rasbora' and 'red-line dwarf rasbora', it's the same small, laterally compressed fish with a warm reddish flush and a lateral stripe that gives it a neat, jewel-like quality at small scale. Worth noting: a similar-looking undescribed relative, traded as Microrasbora cf. rubescens, is best kept separate since the two may hybridize. This is a true schooling fish, and buying a group of at least eight to ten individuals makes a real difference. The fish settle in, display better color, and the males put on genuinely interesting courtship behavior as they compete for female attention. Kept in smaller numbers, they tend to stay shy and washed out. They need calm, similarly-sized tankmates; anything boisterous will stress them and push them off food. In a mature planted setup they'll occasionally breed without any intervention, scattering mildly adhesive eggs among fine-leaved plants and ignoring them entirely afterward. All things considered, a rewarding and manageable choice for a peaceful nano or species-focused aquarium.