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Helfrichi firefish (Nemateleotris helfrichi)
AI illustration, not an ID reference

Helfrichi firefish

Nemateleotris helfrichi

FishSaltwater

Care level
Moderate
Temperament
Peaceful
Reef safe
Yes
Recommended tank
100 L
Maximum size
6 cm
Temperature
24–27 °C
pH
8–8.4
Diet
Planktivore

Care at a glance

Helfrich's firefish is the rarest and most expensive of the firefishes: soft lilac with a glowing yellow head and the same tall, pointed dorsal fin that it flicks nervously up and down. It comes from deeper reef slopes in the Pacific.

It is decidedly peaceful and even shy, so do not house it with busy or dominant fish; those will keep it permanently wedged in a crevice. Provide a tight-fitting cover, because like its relatives it jumps straight out of the tank when startled.

Good to know

  • Known jumper — cover the tank

Related species

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Values are mainstream hobbyist guidance, not gospel — always watch what your own animals need.