Brunneus Fairy Wrasse - Cirrhilabrus brunneus

Aim for at least a 3-foot (90 cm) long tank, even if total volume is only 40–50 gallons, because this species does short, fast bursts of swimming. Length matters more than height. Provide an open central swimming lane with rock structures pushed toward the back and sides. Build several arches, caves, and ledges with live rock, plus one or two shaded overhangs where it can retreat when startled. Avoid a completely bare scape; they are bolder and color up better when they have “escape routes” between rocks. Strong surface agitation and moderate, varied flow along the front of the rockwork suit them well.

This species is often confused with other brunneus-type or dusky-colored fairy wrasses. Look for: • Overall body: Subtle dusky to pinkish-bronze body with a gentle gradient, not sharply banded. • Head: Softly shaded facial area without bold mask-like patterns. • Fins: Dorsal and anal fins tend to show muted, smoky edging rather than bright, neon margins, and the caudal fin usually has softer coloration instead of sharply defined lobes or lyre shapes. • Males vs females: Males display more intense blush on the body and more defined fin shading when excited, but still remain relatively subdued compared to “flashier” Cirrhilabrus. Ask for collection location and compare to known reference photos from reputable ID sources, since closely related species can appear very similar in store lighting and stress coloration.

n most home tanks, keeping a single male or a single female is easiest. A compatible pair or small harem (1 male, 2–3 females) is possible in tanks 4 feet (120 cm) or longer with ample hiding spots. If you start with multiple juveniles/females, the dominant one will usually transition to male over time, showing increased coloration and more assertive behavior. To manage this: • Add all individuals at the same time to reduce hierarchy disputes. • Provide multiple rock clusters so subordinates can retreat and avoid line-of-sight. • Watch for chronic chasing that prevents a fish from feeding; remove the aggressor if harassment is constant. Fairy wrasses can’t be “forced” to remain female long term; given enough time and space, one will typically change into a male.

This wrasse is generally reef-safe with corals and clams and is typically safe with cleaner shrimp (Lysmata spp.), peppermint shrimp, and larger ornamental shrimp like blood shrimp. They primarily eat small planktonic foods in the water column and tiny benthic crustaceans from rock surfaces. However, newly molted, very small shrimp or tiny crabs may be at some risk if the wrasse learns to associate them with food, especially in tight quarters. They do not pick at coral polyps or clam mantles under normal conditions. Provide regular, varied feeding so they are less inclined to experiment with mobile invertebrates, and introduce prized shrimp once the wrasse is settled and well fed.

Use a full coverage lid: either a fitted glass/acrylic top or a tight mesh screen (around 1/4" or 6 mm) with no gaps around plumbing, lights, or overflow boxes. This species will bolt upward when startled, particularly at lights on/off, sudden shadows, or aggressive tank mates. To reduce jump risk: • Use ramp-up/ramp-down lighting schedules if possible so the tank doesn’t go from bright to dark instantly. • Feed small amounts near “lights out” so the fish associates dusk with food instead of stress. • Avoid quick movements near the glass, especially early after introduction. • During maintenance, lower the water level slightly and keep lids or temporary covers over any exposed sections. Once settled, they still remain capable jumpers, so a permanent, secure cover is mandatory for long-term safety.