Whip Fin Fairy Wrasse (Cirrhilabrus Filamentosus) saltwater aquarium fish portrait

The Whip Fin Fairy Wrasse (Cirrhilabrus filamentosus) is a compact Western Pacific labrid associated with Indonesian waters and the Java Sea. Males wear a red upper body over a white underside, with yellow fins, blue markings in the tail, and the trailing dorsal-fin filament that gives the species its name; that filament may extend well beyond the body outline. Females are more uniformly red and considerably more subdued, frequently showing a dark mark near the upper base of the caudal fin. Dominant males intensify their coloration almost instantly during courtship displays, which is one of the great pleasures of keeping this fish in a mature display.

Adult housing should begin at 75 gallons, with the emphasis placed on open water. Build generous live rock structure that includes caves and crevices for retreat, then leave clear lanes for the constant cruising this wrasse does across the middle of the tank. It does not bury itself in sand at night, preferring to wedge into rockwork instead, so a sand bed is optional rather than essential. Provide decent current, strong aeration, and consistently high water quality. A tightly fitted lid or fully enclosed canopy is not negotiable, as fairy wrasses are practiced jumpers and will find any open gap.

In the wild this wrasse hunts zooplankton in the water column above the substrate, picking at drifting prey rather than combing the rockwork. Captive feeding should mirror that carnivorous, small-particle approach. Mysis shrimp, enriched brine shrimp, finely chopped krill, squid, shrimp, clam, and fish flesh are all readily accepted, as are frozen plankton preparations. Quality marine flakes and pellets are often taken as well, though some individuals accept prepared dry foods only after they have fully settled into a tank.

Feed small portions two to three times daily, or more frequently if the schedule allows, since a fish of this size and activity level processes food quickly. Newly introduced specimens frequently remain shy and stay tucked into the rockwork for the first days after arrival. Keep the lights moderate, avoid crowding the tank with boisterous feeders, and offer small amounts of thawed meaty food near the fish until it begins competing confidently in the open.

Mysis Shrimp Enriched Brine Shrimp Chopped Krill Chopped Squid Clam Meat Frozen Plankton Marine Flakes Marine Pellets
This is an active, peaceful, open-water swimmer that spends the day patrolling above the reef structure. In nature it forms small aggregations of juveniles and females attended by a single dominant male, sometimes mixed among other Cirrhilabrus and Paracheilinus species. Aquarium groups follow the same pattern: keep a lone specimen, or one male with several females. Add the whole group at once, or introduce the females first and the male afterward. Only one male should be kept unless the system is exceptionally large. Even a well-mannered individual can become territorial once established, and a large mature male may push at other fairy wrasses, flasher wrasses, and similarly sized wrasses.

Choose calm tankmates and avoid large, intimidating fish that will keep this wrasse hidden in the rocks. Very timid planktivores may lose out at feeding time, so stage meals to give slower feeders a chance. It is safe with corals and sessile invertebrates, making it a reliable resident of a stocked reef aquarium. Most accounts also treat it as invertebrate-safe, though fairy wrasses have been observed picking at small crustaceans, so exercise some caution with tiny ornamental shrimp.

FAQ

Frequently Asked Questions

About the Whip Fin Fairy Wrasse

  • How large an aquarium does an adult Whip Fin Fairy Wrasse need?
    Plan on a 75-gallon aquarium or larger for an adult. The added footprint matters more than the volume, since this wrasse cruises open water for most of the day.
  • Can multiple Whip Fin Fairy Wrasses be kept together?
    Keep a single specimen or one male with several females. Add them simultaneously, or place the females first and the male afterward, and avoid housing multiple males except in an exceptionally large system.
  • Is this wrasse safe for a reef tank and ornamental invertebrates?
    Yes, it is reef safe and leaves corals and sessile invertebrates alone. Fairy wrasses have been reported to pick at small crustaceans, so use some caution with very small ornamental shrimp.