Decolores Wrasse (Pseudojuloides Severnsi) saltwater aquarium fish

Overview:

The Decolores Wrasse is a colorful, active marine fish that does best in a mature, stable reef or fish-only-with-live-rock aquarium. Despite being hardy once settled, it is sensitive to poor water quality and sudden changes, so pristine conditions are important. Provide a tank with plenty of swimming room, a sand bed for resting or burying if needed, and abundant live rock with crevices for security and foraging. A tightly covered aquarium is recommended, as wrasses can jump when startled. Maintain stable salinity, strong filtration, good oxygenation, and consistent temperature. This species is most comfortable in peaceful to moderately busy systems with minimal aggression and a natural day/night rhythm.

Diet and Feeding:

Decolores Wrasses are generally carnivorous and active pickers, so frequent feeding is best. Offer a varied diet of high-quality marine pellets, frozen mysis shrimp, enriched brine shrimp, chopped seafood, copepods, and other small meaty foods. Feeding small portions 2 to 3 times daily helps match their high activity level and supports weight maintenance. Because they spend much of the day hunting, a varied diet with vitamin enrichment is ideal for long-term health and coloration. Avoid relying only on dry foods unless the fish is already well accustomed to them. Overfeeding should be avoided, but underfeeding can quickly lead to loss of condition, reduced activity, and weakened immunity.

Compatibility:

This wrasse is usually best with calm, non-aggressive tankmates that will not compete heavily for food or harass it. Good companions include peaceful reef fish such as gobies, blennies, cardinalfish, dwarf angelfish, and other similarly sized, non-territorial species. It may coexist with other wrasses in larger aquariums, but aggression and competition can occur, especially with similar body shapes or feeding habits. Avoid highly aggressive fish, persistent fin-nippers, and overly dominant species that may stress it into hiding or refusing food. In reef aquariums, it is generally safer with corals and most mobile invertebrates, though very small ornamental crustaceans may be viewed as prey by some individuals. Providing multiple feeding stations and plenty of rockwork helps reduce territorial conflict.

Health and Quarantine:

Like many wrasses, the Decolores Wrasse benefits greatly from careful quarantine before introduction to the display tank. A quarantine period allows observation for external parasites, bacterial issues, and feeding response while reducing the risk of disease transmission. Watch closely for signs of stress such as rapid breathing, flashing, loss of appetite, clamped fins, or unusual hiding. Sudden environmental swings are a common cause of illness, so stable parameters and low stress are essential. Regularly inspect for parasites and maintain excellent water quality through routine testing and water changes. Newly imported individuals may need live or frozen foods to stimulate feeding before transitioning to prepared diets.

mysis shrimp brine shrimp high-quality marine flakes/pellets
Decolores Wrasse are active, constant swimmers that spend much of the day foraging through the rockwork and substrate, so they do best in a spacious aquarium with ample open swimming room plus a deep sand bed and scattered hiding places. They are generally peaceful to mildly territorial, but males can become more assertive, especially toward conspecifics and similarly shaped wrasses. A minimum tank size of 75 gallons is recommended, with a larger footprint preferred so the fish can establish space without excessive stress. A layout built with live rock, caves, and visual barriers helps reduce chasing and encourages natural browsing behavior. They are usually compatible with most reef-safe species and make good community fish with nonaggressive tank mates, though very timid fish may be outcompeted at feeding time. Dietarily, they are carnivorous to omnivorous micro-predators that feed on small crustaceans, worms, and other invertebrate prey, and in captivity they should be offered a varied diet of meaty frozen foods and quality pellets.

FAQ

Frequently Asked Questions

About the Decolores Wrasse

  • Is a Decolores Wrasse truly reef-safe, or will it pick at snails, shrimp, and small crabs?
    Generally yes, but with caveats. A healthy Decolores Wrasse is typically reef-safe with corals and most sessile invertebrates, but it is still a wrasse: it may hunt tiny ornamental crustaceans like very small shrimp, fragile snails, or microfauna in the rockwork if it is hungry or underfed. Larger cleaner shrimp, peppermint shrimp, and sturdier snails are usually fine, but individual personality matters. If you want it to behave well in a reef, keep it well-fed and provide plenty of live rock and sand for natural foraging.
  • Does a Decolores Wrasse need a sand bed, and what happens if it doesn’t have one?
    Yes, it should have a sand bed. This species is a sleeper-type wrasse and buries itself in sand at night and when frightened. Without soft sand, it can become stressed, fail to settle properly, or injure itself trying to sleep on rockwork. A sand bed of at least 2–3 inches of fine, soft substrate is ideal, and the tank should have open areas where it can dive in easily. A lid is also strongly recommended because startled wrasses can jump.
  • What size tank and environment does a Decolores Wrasse actually need to do well long-term?
    For a single adult, a tank around 55 gallons or larger is a good practical minimum, with 75 gallons or more being better if you want stable conditions and active swimming space. They are constant movers that need a mix of open swimming room, rubble, and rockwork for hunting. A mature tank is best because they rely on pods and small benthic prey in addition to prepared foods. Strong filtration, moderate flow, and a tightly covered aquarium are all important.
  • How do you get a Decolores Wrasse to eat prepared foods if it arrives only picking at the rocks?
    This is one of the most common issues. Many new specimens first rely on live prey from the rockwork, so start with small, frequent feedings of frozen mysis, enriched brine shrimp, chopped seafood, and finely sized pellets. Offer food near its normal foraging area and feed multiple times per day at first. If it is very shy, adding live blackworms or live brine temporarily can help bridge the transition. Once settled, most individuals become aggressive eaters, but they still benefit from several small meals daily.
  • Can a Decolores Wrasse be kept with other wrasses, and will it fight in a community tank?
    It can be kept with other wrasses, but tank size and species selection matter a lot. It does best with peaceful to semi-aggressive tankmates and can coexist with many reef-safe wrasses if the aquarium is large enough and has enough rock structure and sleeping space. Problems usually happen in cramped tanks or when paired with similar-looking, similarly shaped wrasses that compete for territory and food. Avoid housing it with highly aggressive wrasses unless the tank is very large and well-structured. Quarantining and introducing it carefully also helps reduce harassment.