Duncan Coral tank mates
Duncanopsammia axifuga
5 rated pairings from the Duncan Coral care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Duncan Coral needs at least 30 gallons on its own; every companion adds to that.
Excellent matches
2 · Same water, complementary zones, no conflict.Ocellaris Clownfish
Amphiprion ocellaris
20 gal min · 3.5" adult · Semi-aggressive
Hardy, reef-safe, and thrive in similar water parameters; may host among Duncan polyps
Nerite Snail
Neritina natalensis
5 gal min · 1" adult · Peaceful
Algae grazers that do not harm corals; help maintain clean surfaces
Good matches
3 · Compatible with normal care — watch space and numbers.Cleaner Shrimp
Lysmata amboinensis
30 gal min · 2.5" adult · Peaceful
Beneficial for tank health; generally ignore corals and help maintain water quality
Firefish Goby
Nemateleotris magnifica
20 gal min · 3" adult · Peaceful
Peaceful, reef-safe, and occupy different tank zones; minimal interaction with corals
Pajama Cardinalfish
Sphaeramia nematoptera
30 gal min · 3.5" adult · Peaceful
Peaceful nocturnal fish that avoid corals; thrive in low-light conditions
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.