The Ring-Tail Cardinalfish (Ostorhinchus aureus), also known as the Band-Tail Cardinalfish, occur among reefs of the Indo-Pacific. They have a golden-yellow body which fades into a white, just before a solid black band at the base of their caudal fin. They can be found in reefs or rocky outcroppings where they seek shelter from predators, as well as scavenging for small crustaceans. They grow to a maximum size of 4 inches and should be kept with fish of similar size and temperament. Their diet consists of invertebrates and crustaceans, such as krill or mysis. 

The Ring-Tailed Cardinal (Ostorhinchus aureus) - A Captivating Addition to Saltwater Marine Aquariums

The Ring-Tailed Cardinal (Ostorhinchus aureus) is a captivating species for enthusiasts seeking to establish a thriving saltwater marine aquarium. Known for its vibrant colors and engaging behavior, this fish adds a lively touch to any tank. With a range of characteristics and considerations, the following comprehensive guide provides valuable insights into successfully keeping the Ring-Tailed Cardinal in a home aquarium.

Habitat of the Ring-Tailed Cardinal

Originating from the Indo-Pacific region, the Ring-Tailed Cardinal is commonly found in coral-rich environments, particularly around Indonesia, the Philippines, and Papua New Guinea. Its natural habitat includes coral reefs and lagoons, where it seeks shelter among coral branches.

Reef Compatibility of the Ring-Tailed Cardinal

The Ring-Tailed Cardinal is considered reef-safe, making it an excellent choice for reef aquariums. It demonstrates minimal interest in coral polyps and is unlikely to cause damage to the delicate structures within a reef setup.

Size and Lifespan of the Ring-Tailed Cardinal

This species typically reaches a maximum size of around 3 inches (7.6 cm) in length. With proper care, Ring-Tailed Cardinals can live for several years, with an average lifespan ranging from 5 to 7 years in captivity.

Diet of the Ring-Tailed Cardinal in Captivity

In captivity, these fish thrive on a diet consisting primarily of high-quality marine flake or pellet food. Additionally, supplementing their diet with frozen or live brine shrimp, mysis shrimp, and other small crustaceans enhances their nutritional intake.

Aquaculture Availability of the Ring-Tailed Cardinal

Ring-tailed cardinals are often aquacultured, making them more readily available to hobbyists. This sustainable practice ensures that the fish you purchase are bred in controlled environments, promoting healthier specimens.

Compatibility with Other Fish and Invertebrates

While generally peaceful, keeping Ring-Tailed Cardinals in small groups of 3 to 5 individuals is advisable. They coexist well with non-aggressive species, such as Chromis, Fairy Wrasses, and Firefish. Avoid pairing them with larger, more aggressive tank mates to prevent territorial disputes.

Sexual Dimorphism of the Ring-Tailed Cardinal

Distinguishing between male and female Ring-Tailed Cardinals is challenging, as they exhibit minimal sexual dimorphism. However, during breeding, the female may appear slightly rounder in the belly.

Juvenile to Adult Coloration Changes in the Ring-Tailed Cardinal

Juvenile Ring-Tailed Cardinals display a muted coloration, primarily yellow with faint stripes. As they mature, their colors intensify, featuring vibrant yellow hues and distinct dark lines extending along the dorsal and anal fins.

Temperament of the Ring-Tailed Cardinal

Known for their peaceful nature, Ring-Tailed Cardinals are suitable for community aquariums. They prefer swimming in the mid to upper levels of the tank, making them a visually appealing addition to your aquatic landscape.

Tank Requirements for the Ring-Tailed Cardinal

    
• Minimum Tank Size: To ensure the well-being of Ring-Tailed Cardinals, a minimum tank size of 30 gallons is recommended.
    
• Provide: Ample live rock structures for shelter, creating a habitat that mimics their natural environment.
    
• Adequate Lighting: And a gentle water flow simulate the conditions found in their native reefs.
  

Water Conditions for the Ring-Tailed Cardinal

    
• Maintaining: Stable water parameters is crucial for the health of Ring-Tailed Cardinals.
    
• Keep: The pH level between 8.1 and 8.4, salinity at 1.020-1.025, water temperature between 75°F to 80°F (24°C to 27°C).
    
• Ensure: A moderate water flow to mimic their natural habitat.
  

Other Common Names of the Ring-Tailed Cardinal

The Ring-Tailed Cardinal is also known as the Gold-Striped Cardinalfish.

Five Compatible Tank Mates for the Ring-Tailed Cardinal

    
• Banggai Cardinalfish (Pterapogon kauderni)
    
• Purple Firefish (Nemateleotris decora)
    
• Royal Gramma (Gramma loreto)
    
• Yellow Clown Goby (Gobiodon okinawae)
    
• Pajama Cardinalfish (Sphaeramia nematoptera)
  

Why Choose Saltwaterfish.com for the Ring-Tailed Cardinal

Purchasing the Ring-Tailed Cardinal from Saltwaterfish.com ensures you receive healthy, aquacultured specimens. Their commitment to sustainable practices and a rigorous quarantine process guarantees that your new additions are disease-free and well-adjusted to aquarium life. With a wide selection of marine species and a reputation for quality, Saltwaterfish.com is a trusted source for marine enthusiasts.

In conclusion, the Ring-Tailed Cardinal is a captivating and reef-safe addition to a saltwater aquarium. By adhering to proper care guidelines, providing a suitable environment, and selecting compatible tank mates, hobbyists can enjoy the beauty and charm of this species in their home aquariums.