Sundadanio axelrodi is a species of freshwater ray-finned fish belonging to the family Sundadanionidae, the tiny danios.

Sundadanio axelrodi reaches a maximum size of 1.7 cm.

Sundadanio was considered monotypic until the genus was reassessed by Conway, Kottelat and Tan in 2011.

[3] Named in honor of pet-book publisher Herbert R. Axelrod (b.

1927), who discovered this species in the tanks of a Singapore aquarium fish exporter.