Mekong Tiger Perch

About

Known variously as the Mekong tiger perch, thin bar datnoid, or NTT among hobbyists, this large predator from the middle and lower Mekong basin has accumulated an impressive list of common names over the years. The scientific name Datnioides undecimradiatus is the only unambiguous label, and it's worth knowing since several of its close relatives share overlapping trade names. Visually, this species is identified by four relatively thin, dark vertical bars on a pale gold-to-yellow body. A sparser, cleaner pattern than the wide, bold barring seen in related datnoids like D. microlepis or D. pulcher. In the wild it occupies large river mainstays and major tributaries, hunting fish and shrimp. That predatory nature carries straight into the aquarium. Adults are not social animals and will respond with aggression toward other datnoids or any fish with a similar deep-bodied, barred profile. They can coexist with large, robust tankmates given adequate space, but keeping two adults together is a gamble unless the group is five or more individuals. Juveniles are somewhat more tolerant of each other. Breeding has never been documented in captivity. With a potential lifespan stretching past a decade, this is a long-term commitment that suits a dedicated intermediate keeper with a genuinely large setup.