The horadandia, green carplet, or glowlight carplet (Horadandia atukorali), is a species of very small freshwater ray-finned fish in the family Danionidae. It reaches a maximum total length of approximately 3 cm (1.2 in). This species is found in slow-moving or still freshwater and brackish habitats in western Sri Lanka, including coastal swamps and vegetated ponds.

The genus Horadandia was formerly considered monotypic, with the single species found in both Sri Lanka and India. However, a taxonomic revision published in 2013 demonstrated that Indian populations represent a distinct species, now recognised as Horadandia brittani, restricting H. atukorali to Sri Lanka.