Grey Head Wrasse (Halichoeres Leucurus) saltwater aquarium fish portrait

The Grey Head Wrasse, Halichoeres leucurus, is a Western Pacific labrid recorded from the Philippines and the Yaeyama Islands south through New Guinea, Flores and Palau. Adult males show the trait that gives the fish its name: a grey-looking head marked with blue facial lines, set against a greenish body with orange spots running along the scale rows. Females are lighter green, also marked with blue lines, and carry blue-edged black eyespots. Adults reach roughly 6 inches, and the species occupies shallow, coral-rich lagoons and inner-channel reefs where mixed coral and algae give way to sand and rubble.

Adult housing should begin at 75 gallons, with open water for swimming and rockwork arranged to create crevices the wrasse can search throughout the day. A fine sand bed is mandatory rather than decorative, since this species buries itself at night and dives into the substrate when startled; published guidance ranges from 2 to 3 inches up to at least 4 inches of fine sand, and deeper is the safer choice. Coarse or sharp substrate is unsuitable. Add this wrasse only to a well-established system, and fit a tight-fitting lid or secure screen, as wrasses are capable jumpers.

On the reef, Halichoeres leucurus works the bottom and rock surfaces for small benthic invertebrates, and that carnivorous appetite carries over directly into the aquarium. Offer a varied meaty diet built around vitamin-enriched mysis shrimp, enriched brine shrimp and other marine frozen or fresh preparations. Quality marine-based flakes and pellets are generally accepted once the fish is settled and can round out the rotation.

Two feedings per day suit the high activity level of this constantly foraging wrasse. A newly introduced specimen may remain buried in the sand for several days before emerging, which is normal behavior rather than a sign of trouble; resist the urge to disturb the substrate and continue offering small feedings until the fish begins hunting in the open. An aquarium with an established population of small live rock organisms gives it something to pick at between meals.

Vitamin-Enriched Mysis Shrimp Enriched Brine Shrimp Frozen Marine Meaty Foods Fresh Chopped Seafood Marine Flake Food Marine Pellets
This is a restless, sand-diving forager that patrols rockwork and open bottom in search of prey, then disappears beneath the substrate to sleep. Wild fish are seen alone or in pairs, with distinct pairing during breeding. Temperament reports vary, and the species is best treated as semi-aggressive: one male per aquarium is the safest approach, and tankmates should be larger and active enough to hold their own. A male kept with several females may settle if the group is introduced simultaneously, but individuals added later are frequently met with territorial aggression. Watch interactions with other wrasses closely, and avoid very small or timid fish.

This species is not reef safe. Corals and clams are often left alone, but ornamental shrimp, crabs, snails, feather dusters and tubeworms are all at risk, and larger individuals may harass or consume small fish. Beyond outright predation, the vigorous digging and foraging habit topples corals placed on the bottom and throws up clouds of sand that can irritate or smother nearby colonies. A fish-only aquarium or a heavily stocked predator system with robust companions suits it far better than a mixed reef.

FAQ

Frequently Asked Questions

About the Grey Head Wrasse

  • What size aquarium does the Grey Head Wrasse need?
    Plan on 75 gallons or larger for an adult. The tank should combine open swimming space with rockwork crevices for foraging and a fine sand bed for burial.
  • Does this wrasse need sand and a covered aquarium?
    Yes. Provide fine sand deep enough for nightly sleeping and startled burial, with published guidance ranging from 2 to 3 inches up to at least 4 inches, and keep a tight-fitting lid in place because wrasses jump.
  • Can it live with corals, shrimp and other small animals?
    It frequently ignores corals and clams, but it preys on ornamental shrimp, crabs, snails, feather dusters and tubeworms, and large specimens may threaten small fish. Its digging can also displace bottom corals or bury them in stirred sand.