The Purple Firefish Goby, Nemateleotris decora, has a lavender/white body with purple markings on the face and dark red and purple colored fins. They are very hardy and peaceful,  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.