Telmatherina opudi is a species of fish in the subfamily Telmatherininae part of the family Melanotaeniidae, the rainbowfishes. It is endemic to Indonesia. his species was described in 1991 by Maurice Kottelat from a type locality of Lake Matano. Kottelat gave the species the specific name of opudi which is the local name for all the species of Telmatherina found in Lake Matano.[1]