Glass-barb

About

The glass-barb (Puntius guganio) is a small, peaceful cyprinid from the rivers, canals, ponds, and backwater habitats of India and Bangladesh, where it tends to favor sandy substrates in calmer sections of flowing water. It's a genuinely obscure species in the hobby. Reliable information on its captive care is sparse, and even its taxonomic standing is unresolved. The genus Puntius has been through significant reclassification over the past decade, with many former members moved into new genera, and this species remains in a kind of holding pattern, likely destined for a genus of its own at some point. What sets it apart from close relatives is a combination of a stiff, serrated last dorsal-fin ray, an incomplete lateral line, and a specific scale count. Traits it shares with very few other species. In the aquarium, it should be kept in a group of eight or more, as shoaling behavior is typical for small barbs of this type, and a larger group will bring out more natural behavior. Given its small adult size and peaceful disposition, it fits reasonably well into a community setup with similarly sized, non-aggressive tankmates. It's an approachable choice for newer keepers willing to work with a species that doesn't have a long hobbyist track record behind it.