Common name: Yellowdevilfish

General information

The Yellow Assessor, Assessor flavissimus, is a small and peaceful marine fish known for its vibrant yellow coloration and unique swimming behavior, often seen swimming upside down. This species is a member of the family Plesiopidae and is native to the reefs of the Western Pacific, particularly around Australia and New Guinea.

Care

Yellow Assessors are suitable for both novice and experienced aquarists due to their hardy nature and adaptability to aquarium life. They thrive in well-established tanks with plenty of rockwork and caves for hiding. These fish are not aggressive and can be kept with a variety of tank mates. They accept a wide range of foods, including frozen and live meaty foods, as well as high-quality dry foods.

Reproduction

In the aquarium, Yellow Assessors may spawn if kept in a group with multiple individuals. They are egg-layers, and the male typically guards the eggs until they hatch. However, raising the fry can be challenging and requires a separate rearing tank with appropriate food and water conditions.

Symbiosis

While not involved in the classic symbiotic relationships seen in some marine species, Yellow Assessors do benefit from living in close association with the reef structure, which provides them with shelter and protection from predators.

Habitat

Yellow Assessors are found in coral reef environments, typically at depths ranging from 5 to 40 meters. They prefer overhangs and caves where they can exhibit their characteristic upside-down swimming behavior. Their natural range includes the Great Barrier Reef and other reef systems in the Western Pacific region.