Cairnsichthys
Cairnsichthys is a genus of rainbowfishes from the subfamily Melanotaeniinae. The genus is endemic to freshwater streams in eastern Queensland in north eastern Australia. The genus was designated as a monotypic genus in 1928 by John T. Nichols and Henry C. Raven but in 2018 a second species was assigned to the genus. Species
Cairnsichthys bitaeniatus Allen, Hammer & Raadik, 2018 - Daintree rainbowfish
Cairnsichthys rhombosomoides (Nichols & Raven, 1928) - Cairns rainbowfish

Etymology
The genus is named after the Australian city of Cairns with the suffix ichthys which is Greek for "fish". References

 
Melanotaeniinae
 
Far North Queensland
Ray-finned fish genera