Red Sea Eightline Flasher Wrasse (Paracheilinus Octotaenia) saltwater aquarium fish portrait

Paracheilinus octotaenia is a Red Sea endemic and one of the most striking flasher wrasses available to reef keepers. Adults carry seven or eight uninterrupted blue lines running the length of a yellow, orange, or red body, a pattern that gives the species its common name, and the tail is rounded rather than elongated. Males are far more intensely colored than females and juveniles, and they flare their fins during courtship displays that briefly amplify their color. On the reef, the species occupies coral-rich seaward slopes, lagoons, reef edges, and rubble or mixed-bottom zones, typically between about 5 and 45 meters.

Adult housing should be a 75-gallon aquarium or larger, arranged so that a broad expanse of open midwater is available for continuous swimming. Just as important is a structured live-rock aquascape with caves and narrow crevices, because this wrasse does not bury itself in sand at night and instead wedges into rockwork to sleep. Deep sand beds are therefore less relevant than well-built shelter. Fit the tank with a tight lid or mesh screen, since startled individuals are capable jumpers. A mature, stable system suits this species best, and its care level is moderate rather than beginner-friendly.

In the wild this is a planktivore, picking zooplankton from the water column above the reef. That specialization carries into the aquarium, where it needs small meaty items rather than large chunks. Suitable foods include mysis shrimp, enriched brine shrimp, copepods, and finely chopped shrimp, squid, clam, and fish flesh, rounded out with appropriately sized marine flakes or pellets.

Feed small portions two to three times daily to match the frequent grazing habit of a plankton feeder. Newly imported specimens sometimes hesitate at prepared foods for this reason, so confirm that a fish is actively eating before purchase and introduce a varied selection of small foods patiently during the first weeks.

Mysis Shrimp Enriched Brine Shrimp Copepods Chopped Shrimp Chopped Squid Chopped Clam Marine Flakes Marine Pellets
This is a peaceful, diurnal wrasse that spends the day cruising open water above the rock. In nature it forms loose aggregations, and the most rewarding aquarium arrangement mirrors that structure: one male kept with several females. Males perform conspicuous fin-and-color flashing displays, which are most frequent and most vivid when females are present. Those same males may harass other Paracheilinus males or closely similar wrasses, so plan additions carefully.

Select calm community fish as companions. Dottybacks and some damselfishes are poor choices, as their aggression will suppress a flasher wrasse and discourage it from displaying or feeding in the open. The species is reef safe, leaving corals and sessile invertebrates alone, and reported as generally safe with ornamental invertebrates such as shrimp, crabs, snails, and clams. Its natural feeding strategy is planktivory rather than hunting benthic invertebrates.

FAQ

Frequently Asked Questions

About the Red Sea Eightline Flasher Wrasse

  • What size aquarium does an adult require?
    Provide a 75-gallon aquarium or larger for an adult. The added length gives this active midwater swimmer the open horizontal room it uses throughout the day.
  • Is it safe with corals and ornamental invertebrates?
    Yes, it is reef safe and leaves corals and sessile invertebrates alone. No specific risk to shrimp, crabs, snails, or clams has been identified, since it feeds on plankton rather than benthic invertebrates.
  • Should it be kept singly or in a group?
    It may be kept alone with peaceful community fish, but a single male with several females is the preferred arrangement and encourages the male's flashing displays. Avoid housing multiple males together, as they tend to harass one another.