Please Note: Unless specified as "WYSIWYG" (What You See Is What You Get), all fish images on this website are stock photos that represent the fish of like and kind. Due to natural variations within species, your item may not look identical to the image provided. The approximate size range may also vary between individual specimens.

Yellow Assessor, Assessor flavissimus

The Yellow Assessor is a strikingly bright reef-safe basslet endemic to the reefs of the Coral Sea and northern Australia. Unlike more common royal or blue assessors, this species boasts a vibrant golden-yellow coloration from snout to tail. Peaceful and cryptic by nature, A. flavissimus often perches upside-down under ledges or in caves, adding an intriguing behavioral element to nano and display reef tanks. Its bold color and unique swimming posture make it a standout choice for customers seeking something both beautiful and unusual.

Husbandry Tips:

• Tank Size: 20 gallons minimum

• Diet: Carnivorous — thrives on frozen mysis, enriched brine, and small meaty fare

• Temperament: Peaceful; may be shy at first

• Reef-Safe: Yes — safe with corals and inverts

• Behavior: Often swims upside down or hovers under rock ledges

• Compatibility: Does best singly or as a bonded pair; safe with peaceful tankmates

Retail Appeal:

• Rare and eye-catching alternative to the more common Royal Gramma or Blue Assessor

• Bright yellow coloration pops in reef tank displays

• Great for nano reefs and aquascapes with caves or overhangs

• Hardy once acclimated, making it suitable for intermediate hobbyists

• Unique behavior (upside-down swimming) sparks interest and conversation