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The Yellow Assesor is not a member of the Dottyback family, but are similar to them in many ways. The Yellow Assesor is native to Australia and is a member of the Plesiopidae family that includes the Marine Betta (Comet). They are not nearly as aggressive or territorial as the Dottybacks, and feed on small crustaceans in the Zooplankton.

Yellow Assesors are a nearly perfect fish for a reef tank system. They can be kept as individuals or in small groups. They live in small caves or under ledges, and are often seen swimming upside down. Creating these kinds of habitat in the aquarium will allow them to exhibit this swimming behavior. They will not bother invertebrates in the reef aquarium.