The Neon Blue Eye is a Nano Rainbowfish for a Saltwater Tank

If you like to extend the limits of what is possible in reefing then let us introduce you to the Neon Blue Eye, Pseudomugil cyanodorsalis. A genus of mainly freshwater fish from Australia and New Guinea, Pseudomugil gertrudae and furcatus are the two species you’ll usually find gracing tropical planted tanks with their delicate blue eyes, double dorsals, and male fin-flaring.