Why has my Yellow Coris Wrasse disappeared into the sand?

This wrasse buries itself in the sand bed to sleep at night or when it feels threatened. It is perfectly normal for them to vanish for several days when first introduced to a new aquarium.

Do I absolutely need a sand bed to keep one?

Yes, a fine sand bed of at least 5 to 7 cm is essential. Without it, the wrasse will become highly stressed and may injure itself attempting to dive into hard substrates or bare glass.

Will a Yellow Coris Wrasse eat my shrimp?

They are generally safe with larger ornamental shrimp like mature Skunk Cleaners or Blood Red Fire Shrimp. However, very small, juvenile, or newly moulted shrimp (such as small Peppermint Shrimp) may be viewed as prey.

Does this fish really eat flatworms?

Yes, they are highly regarded as excellent biological pest controllers and will actively hunt many species of flatworms, bristleworms, and predatory snails that bother corals.

Is it actually a Coris wrasse?

No. The name is a historical trade misnomer; it actually belongs to the Halichoeres genus. True Coris wrasses grow much larger and can be destructive to reef tanks.

MarineMarineIntermediate

Yellow Coris Wrasse

Halichoeres chrysus

A vibrant, active marine fish celebrated for its striking yellow colouration and valuable pest-hunting abilities in reef aquariums.

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Ideal Conditions

Temperature: 23 – 27 °C
pH range: 8.1 – 8.4
Hardness: 8 – 12 dGH
Salinity: 1.02 – 1.025 SG
Adult size: 10 – 12 cm
Minimum 150 litres to provide sufficient swimming space and hunting grounds.: 150 litres+
Lifespan: 5 – 7 years
Diet: Carnivore
Water flow: Moderate to high
Preferred setup: Requires a fine sand bed of at least 5-7 cm depth for sleeping and escaping predators. A tight-fitting lid is essential to prevent jumping.

About the Yellow Coris Wrasse

The Yellow Coris Wrasse is a staple in the marine aquarium hobby, loved as much for its utilitarian pest-control habits as its vivid canary-yellow hue. Despite the common name, it is a true member of the Halichoeres genus and not a Coris wrasse at all. It darts energetically around the rockwork, bringing a dynamic splash of colour to the lower and middle strata of the tank while tirelessly scouring for microscopic prey.

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Is it right for your tank?

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Where Yellow Coris Wrasse comes from

Native range

Eastern Indian Ocean, Western Pacific

Countries / regions

Australia, Indonesia, Philippines, Japan, Solomon Islands

Habitat

Found along reef faces, sheltered lagoons, and rubble zones, always in close proximity to sandy substrates.

Commonly encountered in tropical reef environments rich with branching corals and sandy patches.

Similar species

Radiant Wrasse
Halichoeres iridis
Melanurus Wrasse
Halichoeres melanurus
Six Line Wrasse
Pseudocheilinus hexataenia

We’re adding more full species guides as the catalogue grows.

Compatible tank mates

Reviewed guidance based on this species' recorded traits.

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Ocellaris Clownfish
Amphiprion ocellaris
Occupies different areas of the aquarium and shares a similarly peaceful temperament.
Great
Yellow Tang
Zebrasoma flavescens
An active herbivore that makes an excellent, peaceful companion in adequately sized systems.
Great
Flame Angelfish
Centropyge loricula
Harmonious tankmate that grazes on live rock alongside the actively hunting wrasse.
Great
Peppermint Shrimp
Lysmata wurdemanni
While generally reef-safe, mature wrasses may occasionally hunt small or newly moulted ornamental crustaceans.
Compatible with caution
Lionfish
Pterois volitans
Large predators will easily swallow the slender-bodied wrasse.
Not recommended

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