By Bob Goemans
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 Assessor flavissimus (Yellow Assessor)

Assessor flavissimus
Allen & Kuiter, 1976

Yellow Assessor

Likely Reef Tank Suitable

Likely Fish-Only Tank Suitable


These fishes belong in the Order Perciformes and Suborder Percoidei as members of the Family Plesiopidae (Roundheads or Longfins) which contains two subfamilies, eleven genera, and a total of 30 species.

The subfamily Plesiopinae (roundheads or longfins) contains the following genera of interest.


These members are shy, retiring, and mouthbrooders, and should be kept in an aquarium with numerous hiding places. Do not keep with fishes or crustaceans small enough to be eaten.


They spend their daylight hours in caves with only their tail possibly protruding outward. Their tail contains a false eyespot and gives the fish a moray eel appearance, which discourages predators. They require a calm environment, are not aggressive feeders, and feed on small live fishes or shrimp. Do not keep them with fishes small enough to be eaten.

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