Thynnichthys vaillanti
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Cypriniformes
Family:	Cyprinidae
Genus:	Thynnichthys
Species:	T. vaillanti
Binomial name
Thynnichthys vaillanti Weber & de Beaufort, 1916

Thynnichthys vaillanti is a species of cyprinid of the genus Thynnichthys.^[1] It inhabits rivers in eastern Borneo.^[1] Described by Max Carl Wilhelm Weber and Lieven Ferdinand de Beaufort in 1916, it has a maximum length among unsexed males of 26.4 centimetres (10.4 in) and is considered harmless to humans.^[1]