Yellow Striped Cardinalfish

Also known as Yellow-Striped Cardinalfish, Goldenstriped Cardinalfish

The Yellow Striped Cardinal is an eye-catching species featuring bold golden-yellow horizontal stripes along a silver-gray body. This moderately-sized cardinalfish stands out with its striking linear pattern and peaceful disposition. Hardy and adaptable, it brings both visual interest and calm energy to reef aquariums.

Key Features

• Scientific Name: Ostorhinchus cyanosoma (formerly Apogon cyanosoma)
• Common Names: Yellow-Striped Cardinalfish, Goldenstriped Cardinalfish, Yellow-Banded Cardinal
• Adult Size: Up to 3.5 inches
• Lifespan: 3-5 years with proper care
• Temperament: Peaceful and moderately shy; does well individually or in small groups
• Reef Compatibility: Completely reef safe; will not harm corals or invertebrates
• Minimum Tank Size: 30 gallons minimum; 40+ gallons preferred for groups
• Experience Level: Beginner; hardy and easy to care for

Habitat & Tank Requirements

• Tank Environment: Provide plenty of hiding places with live rock, caves, and overhangs. Appreciates branching corals and rocky structures for shelter. Prefers moderate lighting and calmer water flow areas.
• Water Parameters:
  • Temperature: 72-78°F (22-26°C)
  • Salinity: 1.020-1.025
  • pH: 8.1-8.4
  • Adaptable to typical reef conditions
• Equipment Recommendations:
  • Standard filtration system
  • Protein skimmer
  • Gentle to moderate water circulation
• These maintain stable conditions for this peaceful species.

Diet & Feeding

Yellow Striped Cardinals are carnivores with robust appetites. Recommended foods include:

• Staples: High-quality marine pellets, carnivore pellets
• Frozen Foods: Mysis shrimp, brine shrimp, cyclops, finely chopped seafood, krill, bloodworms
• Live Foods: Live brine shrimp or ghost shrimp (helpful for finicky eaters, though usually not necessary)
• Feeding Frequency: Once or twice daily
• Special Note: Readily accepts most prepared foods; very easy to feed once acclimated

Social Structure & Group Dynamics

• Can Be Kept in Groups: Does well individually or in groups of 3-5
• Pairing Behavior: May form pairs for breeding
• Peaceful Nature: Non-aggressive toward conspecifics and all other species
• Territorial Behavior: Minimal; establishes preferred resting areas but not aggressive

Notes & Considerations

• Bold horizontal yellow stripes create a stunning visual display.
• Slightly larger than many other cardinalfish species.
• Nocturnal tendencies but becomes active during feeding times.
• Relatively slow-moving and peaceful; may be outcompeted for food by aggressive feeders.
• Males are mouth-brooders and may breed in home aquariums.
• Often hovers near rock structures or under overhangs during the day.
• More active than some cardinalfish species once comfortable.
• Adapts well to aquarium life and becomes bolder over time.
• May be found in small aggregations near caves or ledges.
• Excellent choice for peaceful community reef tanks.
• Compatible with other shy, peaceful species.
• The distinctive striped pattern makes it easy to identify and observe.

Why Choose a Quarantined Yellow Striped Cardinal?

Purchasing a quarantined specimen from us means you’re starting with a healthier, better-acclimated fish. All fish are observed, treated as needed, and conditioned to accept prepared foods before sale, giving you a stronger chance of long-term success with this beautiful and peaceful species.