Thryssocypris tonlesapensis, the anchovy rasbora, is a species of freshwater ray-finned fishes belonging to the family Danionidae, the danios or danionins. This species was described in 1984. It has a maximum length of 6.4 centimetres (2.5 in) among unsexed males and is endemic to the Mekong basin, inhabiting Cambodia and Laos. It has 9-10 dorsal soft rays, 15-16 anal soft rays and 43-44 vertebrae. It is considered harmless to humans and is classified as "least concern" on the IUCN Red List.

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