The Royal Pencil Wrasse (Pseudojuloides severnsi), also known as Severn's Pencil Wrasse, can be found among reefs in the Indo-Pacific Ocean. They have a vibrant green body with blue horizontal stripes, bright yellow eyes, and purple stripes along the face. They feed on a variety of invertebrates, including flatworms and small crustaceans, such as amphipods. They reach a maximum size of 5 inches and can be kept in either a reef or fish only system with at least 70 gallons. They should not be kept with small prized crustaceans, such as Pom Pom crabs, and should not be kept with larger predatory fish, such as lionfish or groupers. They do best if kept singly or in a bonded pair. 

Royal Pencil Wrasse: A Captivating Addition to Your Marine Aquarium

The Royal Pencil Wrasse (Pseudojuloides severnsi) is a captivating species frequently sought by marine aquarium enthusiasts for its vibrant colors, active demeanor, and intriguing behavior. Below, we provide a comprehensive guide covering various aspects of keeping the Royal Pencil Wrasse in captivity, tailored for novice and experienced hobbyists.

Habitat of Royal Pencil Wrasse

The Royal Pencil Wrasse is commonly found inhabiting coral reefs and rocky areas in the Indo-Pacific region, particularly around areas with abundant coral growth.

Reef Compatibility of Royal Pencil Wrasse

This species is generally considered reef-safe, as it does not pose a significant threat to corals or other invertebrates.

Size and Lifespan of Royal Pencil Wrasse

Royal Pencil Wrasses typically grow to a maximum size of around 4-5 inches (10-12 cm) in length and can live for several years with proper care.

Diet in Captivity

Royal Pencil Wrasses are primarily carnivorous, feeding on small invertebrates, crustaceans, and zooplankton. They readily accept a variety of prepared foods such as frozen mysis shrimp, brine shrimp, and high-quality pellet or flake foods formulated for carnivorous marine fish.

Aquaculture and Availability of Royal Pencil Wrasse

While aquacultured specimens of the Royal Pencil Wrasse are less commonly available than some other species, they can still be found through reputable marine aquarium suppliers.

Compatibility of Royal Pencil Wrasse

Royal Pencil Wrasses generally exhibit peaceful behavior towards other fish species but may display aggression towards conspecifics or similarly shaped fish. They are best kept in larger aquariums with plenty of hiding spots and open swimming areas. Compatible tank mates include:

•  Flame Angelfish (Centropyge loriculus)
•  Banggai Cardinalfish (Pterapogon kauderni)
•  Royal Gramma (Gramma loreto)
•  Firefish Goby (Nemateleotris magnifica)
•  Coral Beauty Angelfish (Centropyge bispinosa)
  
  

Sexual Dimorphism of Royal Pencil Wrasse

Sexual dimorphism in Royal Pencil Wrasses is not readily apparent, as males and females exhibit similar external characteristics. However, males may display more vibrant coloration and elongated fins than females, especially during courtship displays.

Juvenile to Adult Coloration Changes of Royal Pencil Wrasse

Juvenile Royal Pencil Wrasses typically exhibit duller coloration compared to adults. As they mature, their colors become more vibrant, with males often displaying stunning blue, yellow, and red hues, while females may retain a more subdued appearance.

Temperament of Royal Pencil Wrasse

Royal Pencil Wrasses are generally peaceful but may exhibit territorial behavior towards conspecifics or similar-shaped fish. They are active swimmers and may become stressed in overly aggressive tank environments or if housed with overly dominant tank mates.

Tank Requirements for Royal Pencil Wrasse

To ensure the well-being of Royal Pencil Wrasses, a minimum aquarium size of 70 gallons is recommended for a single specimen, with larger tanks preferable for housing multiple individuals.

Why Purchase the Royal Pencil Wrasse from Saltwaterfish.com

Saltwaterfish.com prides itself on offering high-quality marine fish and invertebrates from reputable suppliers. With a commitment to sustainability and customer satisfaction, Saltwaterfish.com ensures that all specimens are appropriately quarantined and acclimated before being made available for purchase.

In conclusion, the Royal Pencil Wrasse is a stunning addition to saltwater aquariums, prized for its vibrant colors, active behavior, and reef-safe nature. With proper care and attention to tank requirements, this species can thrive in captivity, providing endless enjoyment for marine enthusiasts.