The The Hawaii Helfrichi Firefish, Nemateleotris helfrichi, has a bright yellow face fading into a brilliant purple then fading into a pearly white. They are hardy and very peaceful and can be housed with other peaceful fish in a reef tank setting, but may become territorial towards other blennies, gobies or dartfish in smaller tanks.
Gobies tend to stay mainly towards the bottom of the tank, burrowing and sifting through the sand. However, this goby is also a known jumper, so a tight fitting lid is suggested. Diet should include a variety of frozen or live mysis shrimp and vitamin enriched brine shrimp 1-2 times daily.
My firefish is extremely adorable. He's very healthy and very active, and absolutely gorgeous. I'm extremely satisfied with my purchase