Mengyejiang

The dwarf snakehead, Channa gachua, is a snakehead recorded across an enormous range from Iran to Taiwan and Bali. There is significant evidence that C. gachua as currently understood is a complex of similar-looking species in need of taxonomic review. A mouthbrooder bred regularly in captivity, it can share a well-chosen community with peaceful fishes too large to be prey, but populations should not be mixed as some may hybridise.

Schistura callichromus is a nemacheilid loach recorded only from the Babianjiang River in the Red River basin, Yunnan Province, China. It is expected to occur in Vietnamese waters as well, and Kottelat (2012) amended the spelling of its name to 'callichroma'. Wild specimens have been observed living in social aggregations of up to six in clear, well-oxygenated headwater streams.

Schistura laterivittata is a nemacheilid loach recorded only from the Babianjiang River in the Red River basin, Yunnan Province, China. Most recent authors have treated it as a synonym of S. caudofurca, but this appears to be a case of misidentification: S. caudofurca has a deeply forked caudal-fin and no dark lateral body stripe. It is expected to occur in Vietnamese waters as well.