Mystery Wrasse (Pseudocheilinus ocellatus)

The Mystery Wrasse, also known as the Five-Bar Wrasse or Tail-spot Wrasse, is one of the most enigmatic and visually stunning members of the Pseudocheilinus genus. It is a cousin to the common Six-line Wrasse, but it is vastly more prestigious, colorful, andusuallya bit more well-behaved. Found in the deep reefs of the Central and Western Pacific, its vibrant “electric” colors and secretive nature make it a prized addition for advanced reef keepers.

Key Information

• Common Names: Mystery Wrasse, Five-Bar Wrasse, Ocellated Wrasse

• Scientific Name: Pseudocheilinus ocellatus

• Origin: Central/Western Pacific (Marshall Islands to the Coral Sea)

• Max Size: 1012 cm (approx. 45 inches)

• Lifespan: 58 years

• Temperament: Semi-aggressive; can be very territorial toward new additions

• Diet: Carnivore Specialist in small crustaceans and pests

• Care Level: Easy to Moderate

Appearance & Identification

The Mystery Wrasse looks like it belongs in a neon-lit futuristic city:

• The Color: A brilliant, saturated magenta-to-purple body.

• The “Bars”: Features five to six thin, vertical neon-white to yellow bars along the midsection.

• The Face: The head is covered in an intricate “circuitry” of bright yellow and orange scribbles.

• The Eye-spot: A prominent black ocellus (fake eye) rimmed in blue or yellow is located at the base of the tail, designed to confuse predators.

• The Eyes: Large, inquisitive eyes with a distinct “double-bar” pupil characteristic of this genus.

Behaviour & Tank Compatibility

• The Predator-in-Disguise: Like the Melanurus Wrasse, this fish is an excellent hunter. It will actively seek out flatworms, pyramidellid snails, and small bristle worms.

• The Secretive Patrol: It is a “cryptic” swimmer. It spends much of its time darting through holes and tunnels in the live rock, appearing and disappearing like a ghosthence the name “Mystery.”

• Aggression: Caution is needed. While more peaceful than a Six-line, it can be a “bully” to other wrasses, dragonets, or small bottom-dwellers added after it has established its territory. It is best to add this fish last.

• Reef Safe: 100% Reef Safe with corals. However, it is not safe for small ornamental shrimp (like Sexy Shrimp) and may harass larger shrimp if they are added after the wrasse.

Ideal Tank Setup

• Tank Size: A minimum of 115L150L (3040 Gallons). They are very active and require a complex aquascape to feel secure.

• Rockwork: This fish needs “Swiss cheese” rockwork. The more tunnels, caves, and crevices you provide, the more you will see its natural hunting behavior.

• Substrate: Unlike Leopard Wrasses, they do not bury in the sand. They sleep in a mucus cocoon tucked deep inside a rock crevice.

• Lid is Mandatory: They are incredibly fast and “twitchy.” If startled, they will launch themselves out of the tank in the blink of an eye.

• Feeding: Very easy to feed. They greedily accept frozen mysis, brine shrimp, and high-quality pellets.

Why Choose the Mystery Wrasse?

The Mystery Wrasse is for the hobbyist who wants high-end beauty and functionality. It is a hardy, disease-resistant fish that adds a level of sophistication to any reef. It is essentially the “luxury version” of a pest-control wrasse.