Pink-Streaked Wrasse (Pseudocheilinops ataenia)

Pink-Streaked Wrasse (Pseudocheilinops ataenia)

The Pink-Streaked Wrasse, scientifically known as Pseudocheilinops ataenia, is often hailed as the “perfect” wrasse for nano reef enthusiasts. Also known as the Pelvic-spot Wrasse or Twin-spot Pygmy Wrasse, this diminutive beauty is native to the cryptic coral crevices of Palau, Indonesia, and the Philippines. Unlike many of its larger and more aggressive relatives, the Pink-Streaked Wrasse is celebrated for its peaceful temperament and its striking coloration—featuring horizontal pinkish-orange stripes set against a yellow-to-olive body. Its large, expressive eyes and rhythmic swimming style make it a captivating resident for any mature reef system.

Aquarium Conditions

The Pink-Streaked Wrasse is an exceptional candidate for smaller systems, requiring a minimum of 75 liters (20 gallons) for a single specimen. For those wishing to keep a pair or a small harem, a volume of 115–150 liters is recommended. The most critical requirement is an abundance of live rock; this fish spends its day weaving through tight gaps and hunting micro-fauna. Water parameters should remain stable, with temperatures between 22–26°C (72–78°F), pH at 8.1–8.4, and salinity at 1.020–1.026 sg. While they do not strictly require a deep sand bed like some wrasses, they do create a protective mucus cocoon at night within rocky crevices to hide from predators. A secure, tight-fitting lid is mandatory, as they are prone to jumping when startled.

Nutrition

Pseudocheilinops ataenia is an omnivore with a strong preference for small meaty foods and zooplankton. In a well-established reef, they will spend hours picking at “pests” like flatworms or small pyramidellid snails, providing a natural cleaning service. In the aquarium, they should be offered a varied diet of frozen mysis shrimp, vitamin-enriched brine shrimp, cyclops, and high-quality micro-pellets. To maintain their health and vibrant stripes, feeding 2–3 small portions daily is ideal. They thrive best in systems with a healthy population of naturally occurring copepods.

Behavior and Compatibility

This is one of the most docile wrasse species available in the hobby. It is notoriously shy during the first few days of introduction and may hide until it feels secure. Because of its passive nature, it should never be housed with aggressive wrasses like the Six-Line Wrasse (Pseudocheilinus hexataenia), which will likely bully it. Instead, pair it with peaceful tank mates such as gobies, blennies, or firefish. They are completely reef-safe and will not bother corals or most ornamental invertebrates. Interestingly, they are protogynous hermaphrodites (females can transition to males), making it possible to keep them in small groups if introduced simultaneously in a large enough tank.

Breeding Behavior

In their natural habitat, Pink-Streaked Wrasses are pelagic spawners, usually forming pairs that rise into the water column at dusk to release eggs and sperm. While courtship displays—where the male’s colors intensify and he “flashes” his fins—are frequently seen in home aquaria, successful captive breeding is extremely rare. The larvae are planktonic and require specialized, microscopic food sources that are difficult to maintain in a standard reef setup. Most specimens in the hobby are wild-caught, though they are known for acclimating well to captive life.

Health and Diseases

The Pink-Streaked Wrasse is generally hardy but can be sensitive to the stress of shipping and sudden changes in water chemistry. They are susceptible to common marine parasites like Ich and Flukes. A quarantine period of at least 4 weeks is strongly recommended to ensure the fish is eating well and disease-free before entering the display tank. Providing a low-stress environment with plenty of hiding spots is the best way to support their immune system. With proper care, these miniature wrasses can live for 3 to 5 years, remaining a loyal and helpful member of the reef community.

Cover Photo Credit: lisasreef.weebly.com

Reference:

• Reef 2 Reef: Species Spotlight: Pseudocheilinops ataenia – The Pink‑Streaked Wrasse / Last Access Date: 02/04/2026
• Live Aquaria: Pink‑Streaked Wrasse – Marine Fish / Last Access Date: 02/04/2026
• Light Fish: Pink-Streaked Wrasse Care Guide  / Last Access Date: 02/04/2026
• Reef App: Pseudocheilinops ataenia – Encyclopedia Entry / Last Access Date: 02/04/2026
• Wikipedia: Pelvic‑spot wrasse / Last Access Date: 02/04/2026