
Purple firefish
Nemateleotris decora
FishSaltwater
- Care level
- Easy
- Temperament
- Peaceful
- Reef safe
- Yes
- Recommended tank
- 100 L
- Maximum size
- 9 cm
- Temperature
- 24–27 °C
- pH
- 8–8.4
- Diet
- Planktivore
Care at a glance
The purple firefish has a white front that shifts through purple into fiery red towards the rear, with a tall, pointed first dorsal fin that it flicks nervously up and down. It hovers just above the rock in the current, picking plankton from the water.
At the slightest disturbance it darts into a crevice, and that is exactly why a closed lid is necessary: startled, it will just as readily jump out of the tank. Keep it alone or as an established pair, since two unpaired fish of similar size usually will not tolerate each other.
Good to know
Related species
Keep Purple firefish in the BlubHub app
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Values are mainstream hobbyist guidance, not gospel — always watch what your own animals need.





