Strawberry Rasbora

About

A tiny fish from the swampy lowlands of southern Thailand, Boraras naevus belongs to a genus of miniaturised cyprinids that evolved their small adult size through a well-documented biological process rather than simple dwarfism. Wild populations are known from the lower Tapi drainage on the Gulf of Thailand side of the peninsula, where they inhabit slow-moving, often nutrient-poor waters typical of forest wetland habitats. In terms of looks, this species sits closer to its Indochinese relatives than to the Malay Archipelago members of the genus, sharing a slightly deeper, more compact body shape. Males carry a notably large dark blotch on the flank. Larger than in females, which is one of the cleaner ways to tell this species apart from close relatives like B. maculatus and B. micros. Males also develop red and black patterning in the dorsal and anal fins when in good condition and competing for females. Before it was formally described, this fish circulated in the trade under names like strawberry rasbora and red micros. It is still exported only sporadically. Despite its beginner-friendly care level, its tiny size means it really belongs in a species-focused or carefully chosen community with equally small, gentle tankmates. Keep a group of at least eight to ten. They settle in better, colour up more reliably, and the natural social behaviour becomes genuinely worth watching.