 Mastacembelus thacbaensis Nguyen Nguyen 2005 - Encyclopedia of LifeLife ... Animals ... Vertebrates ... Ray-finned fishes ... Freshwater spiny eels ...Life Cellular Eukaryotes Opisthokonts Animals Bilateria Deuterostomes Chordata Vertebrates Gnathostomata Osteichthyes Ray-finned fishes Actinopteri Neopterygii Teleostei Osteoglossocephalai Clupeocephala Euteleosteomorpha Neoteleostei Eurypterygia Ctenosquamata Acanthomorphata Euacanthomorphacea Percomorphaceae Anabantaria Synbranchiformes Mastacembeloidei Freshwater spiny eels Mastacembelus Mastacembelus thacbaensis is a species of ray-finned fish in the family freshwater spiny eels. 