Scarlet Striated Wrasse (Pseudocheilinus Evanidus) saltwater aquarium fish

Overview:

The Scarlet Striated Wrasse is a brightly colored, highly active marine fish that does best in a mature, stable saltwater aquarium. It should be housed in a tank with plenty of open swimming space, along with rockwork arranged to create caves, ledges, and secure sleeping areas. Fine sand is often helpful, since many wrasses like to dive into substrate or rest securely at night. A tightly fitted lid is important because this species may jump when startled. Water quality must remain very stable, with strong filtration, good oxygenation, and consistent parameters. This wrasse is best kept in a reef-safe environment only if tankmates and décor are chosen carefully, since its curious and energetic behavior can disturb very small or delicate organisms.

Diet and Feeding:

Scarlet Striated Wrasses thrive on a varied, protein-rich diet. Offer high-quality frozen marine foods such as mysis shrimp, finely chopped seafood, enriched brine shrimp, and marine carnivore preparations. Many individuals also accept pellets or flakes formulated for carnivorous marine fish, but these should be supplemented with meaty frozen foods to support long-term health and coloration. Feed small portions two to three times daily rather than one large feeding, because wrasses are active foragers with high metabolisms. It is important to observe body condition; a healthy specimen should appear full but not bloated. Uneaten food should be removed promptly to preserve water quality.

Compatibility:

This species is generally compatible with peaceful to semi-aggressive marine fish of similar size that will not outcompete it for food. Good tankmates may include tangs, clownfish, blennies, gobies, and other non-territorial reef fish. Avoid highly aggressive species that may harass the wrasse, as stress can quickly lead to poor feeding and disease susceptibility. Extremely small ornamental crustaceans, such as tiny shrimp or very small crabs, may be at risk depending on the individual fish’s hunting instincts. Likewise, slow-feeding or timid tankmates may struggle during meals if the wrasse is especially energetic. Provide multiple feeding locations and hiding spaces to reduce competition.

Health and Quarantine:

Before introduction to the display tank, quarantine the Scarlet Striated Wrasse for several weeks to monitor for parasites, bacterial infections, and feeding problems. Wrasses can be sensitive to abrupt salinity or temperature changes, so acclimation should be slow and careful. Watch for symptoms such as rapid breathing, flashing, loss of appetite, frayed fins, white spots, or hiding during daylight hours. Preventive care should include stable water quality, varied nutrition, and low stress. Because this fish is active and easily startled, sudden lighting changes or frequent tank disturbances should be minimized. Early intervention is especially important if disease is suspected, since wrasses can decline rapidly once stressed.

mysis shrimp brine shrimp high-quality marine flakes/pellets
The Scarlet Striated Wrasse is an active, midwater-to-bottom foraging species that needs plenty of open swimming room along with ample live rock and crevices for retreat and resting. It is generally peaceful to semi-aggressive, but like many wrasses it can become territorial, especially toward conspecifics or similarly shaped wrasses housed in undersized quarters. A minimum tank size of 75 gallons is recommended, with a longer layout and well-structured rockwork that creates visual barriers to reduce line-of-sight aggression and give subordinate fish places to evade pursuit. It is usually compatible with most reef-safe species and works best with robust, non-bullying tank mates that will not outcompete it or stress it. Dietarily, it is carnivorous to omnivorous, feeding on small crustaceans, worms, zooplankton, and other meaty prey items it actively hunts through the substrate and rockwork. Regular offerings of varied frozen and prepared foods, along with a mature aquarium that supports natural foraging behavior, help maintain condition and reduce aggression.

FAQ

Frequently Asked Questions

About the Scarlet Striated Wrasse

  • How big does a Scarlet Striated Wrasse actually get, and what tank size is best for long-term success?
    Most Scarlet Striated Wrasses stay small, usually around 2.5–3 inches as adults. Even though they’re modest in size, they need more than a tiny tank because they’re active, secretive swimmers that like rockwork and hiding spaces. A 30-gallon tank can work for a single specimen if it has plenty of caves and stable water quality, but a 40+ gallon reef is a safer long-term choice. They do best in mature systems with lots of live rock and microfauna.
  • Is a Scarlet Striated Wrasse truly reef-safe with shrimp, snails, and corals?
    Yes, they’re generally considered reef-safe and are usually fine with corals, snails, and most ornamental shrimp. They are not known for nipping SPS or LPS, and they typically spend more time hunting tiny crustaceans and picking at rock than bothering larger tankmates. That said, very small decorative shrimp or tiny newly settled crustaceans can sometimes be at risk in any wrasse system, especially if the fish is hungry and the tank is sparsely fed.
  • What does a Scarlet Striated Wrasse eat, and why do some newly imported ones refuse food?
    In the wild, they feed on tiny benthic invertebrates, copepods, amphipods, small worms, and other microfauna picked from rockwork. In captivity, many do best on a varied diet of frozen mysis, enriched brine shrimp, finely chopped seafood, and quality small marine pellets. Newly imported individuals often refuse food because they’re stressed, shy, or dependent on live prey at first. A mature tank with plenty of pods greatly improves the odds of success. If one is not eating, target feeding near its hiding area and offering live foods can help trigger feeding.
  • Do Scarlet Striated Wrasses bury themselves in the sand like other wrasses?
    No, this is an important distinction for the species. Scarlet Striated Wrasses are typically rock-dwelling and secretive, and they usually sleep or retreat into crevices rather than burying in sand. They want tight rockwork, overhangs, and small bolt-holes where they can vanish quickly. Because of this, a sand bed is not required for them, but secure aquascaping is very important.
  • Can a Scarlet Striated Wrasse be kept with other wrasses, and how territorial are they?
    They can be kept with other wrasses, but tank size and species choice matter a lot. They are usually peaceful with dissimilar tankmates, yet they may become territorial toward similar-shaped, similarly colored, or closely related wrasses, especially in smaller tanks. In a larger reef with plenty of territory and hiding spots, they’re much less likely to cause problems. Best results come from introducing them before more dominant wrasses or keeping them with tankmates that don’t compete for the same rock-dwelling niche.