Richmond's Wrasse (Halichoeres Richmondi) saltwater aquarium fish portrait

Richmond's Wrasse, also traded as the Chain Line Wrasse, is a Western Pacific member of the Halichoeres genus recognized for a dramatic change in pattern as it matures. Juveniles are light blue-green with orange striping, two distinct black ocelli, and an orange anal fin. Adults transition to a green body etched with fine blue chain-like markings, with blue trim along the dorsal, caudal, and anal fins. In the wild, the species occupies shallow lagoon and channel reefs with rich soft-coral growth, down to at least 12 meters, where it is typically encountered in small loose groups. Aquarium specimens commonly reach around 6 inches.

Plan on a 75-gallon aquarium or larger for an adult, arranged as a sand flat with substantial rockwork to mirror the reef and lagoon habitat this fish prefers. Like other Halichoeres, it retires into crevices within the rock structure and secretes a mucus cocoon to sleep rather than relying on burying itself in the substrate, so leave plenty of accessible gaps and overhangs among the stone. Open swimming lanes above the sand give this active fish room to patrol. A tightly fitted lid or screen is not optional, since wrasses are determined jumpers and will find the smallest opening. Care level is moderate, reflecting the need for steady feeding and a mature, well-structured system.

Richmond's Wrasse is a carnivore that forages over sand flats and reef structure for small prey. In the aquarium, frozen meaty foods form the backbone of the diet, and a rotation of different items produces the best color and condition. Mysis shrimp, enriched brine shrimp, chopped krill, finely diced marine fish or shellfish flesh, and a quality carnivore pellet are all appropriate.

Wrasses have short digestive tracts and high metabolic demands, so small portions offered often work far better than one large meal. Feed at least three to four times daily, giving only what the fish consumes quickly. Consistent, generous feeding also reduces the likelihood that a wrasse turns its attention to small motile invertebrates. Newly introduced specimens may spend their first day or two hiding in the rockwork, and a quiet tank with frequent small offerings helps them settle in.

Frozen Mysis Shrimp Enriched Brine Shrimp Chopped Krill Minced Marine Fish Flesh Chopped Shellfish Carnivore Pellets
This is a social, peaceful wrasse that occurs in small loose groups on the reef and remains actively on the move through the day, working the sand and rock in search of food. It is well suited to a community reef display of similarly mild-mannered fish. Pair it with peaceful tankmates and avoid aggressive species that will harass a fish spending much of its time out in the open. Because the species rests inside rock crevices within a mucus cocoon, adequate hiding structure contributes directly to a settled, confident specimen.

Halichoeres wrasses pose no threat to corals, and Richmond's Wrasse can be housed among stony and soft corals without concern for the corals themselves. Motile invertebrates are a different matter. Wrasses in this group may sample ornamental shrimp, small crabs, snails, or clams, particularly when underfed, and no species-specific invertebrate safety data exists for this wrasse. For that reason it is not considered fully reef safe, and aquarists keeping a prized invertebrate collection should weigh that risk before adding one.

FAQ

Frequently Asked Questions

About the Richmond's Wrasse

  • How big of a tank does a Richmond's Wrasse need?
    An adult should be housed in a 75-gallon aquarium or larger, arranged with a sand flat and generous rockwork for cover.
  • How large does Richmond's Wrasse get?
    Aquarium specimens typically reach about 6 inches in length as adults.
  • Is Richmond's Wrasse safe with corals and invertebrates?
    It presents no risk to corals, but it is not considered fully reef safe because wrasses in this group may prey on ornamental shrimp, small crabs, snails, or clams, especially if underfed.