Macrochirichthys macrochirus

Macrochirichthys macrochirus, the long pectoral-fin minnow and giant sword minnow or freshwater wolf-herring, is a species of cyprinid fish found in rivers and lakes in Southeast Asia (Vietnam and Thailand to the Greater Sundas) where it is used as a food fish. It is the only member of its genus. It is predatory and reaches up to 1 m in length.

Range in Thailand
Found in the south of Thailand, Chao Phraya River, Mekong River, Nan River, Mae Klong River, and Tapee River Basin from Nonthaburi, Ayutthaya, Ratchaburi and Chiang Rai Provinces.

The common names of this species of minnow in Thai are pla fak pra (ปลาฝักพร้า, lit "machete fish") and pla darb lao (ปลาดาบลาว, lit "Laotian blade fish") according to its shape.