Helfrichi Firefish tank mates

Nemateleotris helfrichi

5 rated pairings from the Helfrichi Firefish care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Helfrichi Firefish needs at least 20 gallons on its own; every companion adds to that.

Fits a 20-gallon tank →Peaceful →

Excellent matches

1 · Same water, complementary zones, no conflict.

Cleaner Shrimp

Lysmata amboinensis

30 gal min · 2.5" adult · Peaceful

Non-aggressive and beneficial; will not compete with firefish for food or space

Good matches

3 · Compatible with normal care — watch space and numbers.

Ocellaris Clownfish

Amphiprion ocellaris

20 gal min · 3.5" adult · Semi-aggressive

Similar peaceful temperament and reef-safe; compatible water parameters

Neon Goby

Elacatinus oceanops

20 gal min · 2" adult · Peaceful

Small, peaceful goby with similar habitat preferences and non-aggressive behavior

Fire Shrimp

Lysmata debelius

20 gal min · 2" adult · Peaceful

Peaceful invertebrate that occupies different ecological niche; reef-safe

Use caution

1 · Works in the right setup; read the note before combining.

Pistol Shrimp

Alpheus randalli

20 gal min · 2" adult · Semi-aggressive

Can coexist but may compete for hiding spaces; monitor for aggression

Planning this tank?

Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.

Full care guide Stocking calculator