10493 Melanotaenia gracilis Allen, 1978 Melanotaeniidae Rainbowfishes, blue eyes Atheriniformes Teleostei Slender rainbowfish Oceania: restricted in the Drysdale and King Edward River systems in the extreme northern portion of Western Australia, 500 km southwest of Darwin. FB 2738108 Melanotaenia gracilis AMNH 51619 1977 Melanotaenia gracilis