Yellow Assessor Basslet

The Yellow Assessor Basslet is a beautiful and peaceful reef fish known for its brilliant yellow coloration, compact size, and fascinating swimming behavior. Often found hovering around caves and overhangs, Assessors are famous for their ability to swim at unusual angles — including upside down beneath rock ledges.

Hardy, reef safe, and relatively peaceful, the Yellow Assessor Basslet is an excellent choice for aquarists looking for a colorful and unusual addition to a community reef aquarium.

🔵 Conditioned & Prepared – Actively Eating

Quick Facts

• Care Level: Easy
• Temperament: Peaceful
• Reef Compatibility: Reef Safe
• Minimum Tank Size: 20 gallons
• Size: Up to approximately 3 inches

What Makes This Fish Special?

The Yellow Assessor Basslet stands out for its intense yellow coloration and unusual behavior. Unlike many small reef fish, Assessors frequently orient themselves to the surfaces around them rather than the aquarium floor, sometimes swimming vertically or completely upside down beneath caves and overhangs.

This behavior is completely natural and makes them especially entertaining to observe.

Their manageable adult size, peaceful disposition, and vivid coloration make them an excellent addition to both smaller reef systems and larger community aquariums.

Behavior & Husbandry

Yellow Assessor Basslets prefer aquariums with plenty of rockwork, caves, ledges, and shaded areas where they can establish a secure territory.

They may initially spend considerable time around caves or beneath overhangs but typically become more visible as they become comfortable with their surroundings.

They are generally peaceful toward unrelated species and are well suited for community reef aquariums with other non-aggressive tankmates.

Feeding & Diet

Carnivorous and generally easy to feed once conditioned.

What We Feed at Lush Corals:

• Frozen mysis shrimp
• Enriched brine shrimp
• High-quality pellets

In Your Aquarium:

• Frozen foods
• Pellets
• Small meaty foods

A varied diet and regular feeding help maintain strong coloration, body condition, and long-term health.

Compatibility Notes

Compatible with:

• Clownfish
• Gobies
• Blennies
• Fairy wrasses
• Flasher wrasses
• Cardinals
• Most peaceful reef fish
• Reef invertebrates

Avoid aggressive or highly territorial tankmates that may intimidate this relatively peaceful species.

Best maintained in a peaceful reef aquarium with plenty of caves, overhangs, and protected areas.

Lush Corals Conditioning Process

This fish has been carefully conditioned and prepared prior to sale.

Each fish is:

• Carefully inspected upon arrival
• Proactively dipped and treated
• Observed for health and behavior
• Conditioned to eat prepared foods

This helps ensure your fish arrives healthy, feeding, and well-adjusted, giving you a strong start in your aquarium.