Blue Assessor tank mates
Assessor macneilli
5 rated pairings from the Blue Assessor care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Blue Assessor needs at least 20 gallons on its own; every companion adds to that.
Excellent matches
3 · Same water, complementary zones, no conflict.Ocellaris Clownfish
Amphiprion ocellaris
20 gal min · 3.5" adult · Semi-aggressive
Similar peaceful temperament and saltwater requirements; occupy different tank zones
Neon Goby
Elacatinus oceanops
20 gal min · 2" adult · Peaceful
Small, peaceful, and reef-safe; compatible water parameters and feeding habits
Cleaner Shrimp
Lysmata amboinensis
30 gal min · 2.5" adult · Peaceful
Reef-safe invertebrate; provides cleaning services without predation risk
Good matches
2 · Compatible with normal care — watch space and numbers.Also recommended alongside Blue Assessor
Species whose own guides list Blue Assessor as a tank mate.
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.