Blue Assessor

Assessor macneilli

Blue Devilfish · Macneill's Assessor

Predators & Oddballs

A unique Australian endemic with a deep royal blue body that often swims upside-down beneath ledges and overhangs. Blue assessors are peaceful, hardy, and completely reef-safe — an excellent choice for community reef tanks. They are mouth-brooders that can be bred in captivity and are increasingly available through Australian aquaculture.

Difficulty Beginner
Reef Safety Reef Safe
Temperament Peaceful
Min Tank Size 75L
Diet Carnivore

Available Stock

No Blue Assessor in stock at any Australian reef shop we track, as of 2026-08-23. We follow 6 Blue Assessor listings from Aquarium Gallery, Hurstville Aquarium, Nature Aquariums, Nicks Aquarium, Ocean Reefs Marine and Reef Haven, so it may come back into stock here.

More Predators & Oddballs

Dwarf Lionfish Flame Hawkfish Foxface Rabbitfish Longnose Hawkfish Royal Gramma Valentini Puffer Yellow Assessor

Products link directly to the shop's listing. AussieReefing is not affiliated with these shops.