Shimoga Loach

About

The Shimoga Loach (Nemachilichthys shimogensis) comes from the fast-moving waters of the Thunga River near Shimoga in Karnataka, India, and belongs to a small genus with a surprisingly tangled taxonomic history. Recent molecular and morphological work has even raised questions about whether it and its closest relative are truly distinct species. Physically, it has the classic nemacheilid build: an elongated, nearly cylindrical body, a pointed snout, large eyes relative to other loaches in the family, and a deeply forked tail with pointed lobes. It's a compact fish, topping out around three inches in most aquariums. Despite being labeled aggressive overall, this species is actually peaceable toward its own kind and clearly benefits from being kept in groups of four or more, becoming noticeably more active and confident when it has company. The aggression to watch for is directed at similarly shaped, bottom-dwelling fish from other genera, particularly other nemacheilids that share its territorial streak. Good tankmates are open-water cyprinids and rheophilic species that occupy different layers of the tank. Breeding has not been recorded in captivity. Its care requirements are accessible enough that it isn't limited to experienced keepers, provided the aquarium reflects its riverine origins with good flow and well-oxygenated water.