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Yellowstriped Cardinalfish

Scientific Name: Ostorhinchus cyanosoma
Family: Apogonidae

About the Yellowstriped Cardinalfish

Species Type: Saltwater Fish
Category: Cardinalfish

Care Level: Easy. Ships well and acclimates well to the home aquarium. Accepts dried foods eagerly and quickly after acclimation. Is resistant to disease. An overall good choice for the new saltwater hobbyist.
Origin: South Asia Ocean
Compatibility/Temperament: Cardinalfish by no means are considered an "aggressive" fish. They do very well when in small schools. They prefer lots of hiding places since they are a mild, slow-swimming fish. They are considered a reef-safe fish.


The Yellowstriped Cardinalfish is a very attractive addItion to any reef or fish only aquarium. They prefer to hide in sea grasses or in the spines of Sea Urchins, but they do not need an urchin to thrive in home aquaria. The vibrant yellow stripes against the gray body make for a nice colorful addition to any home aquaria, and their peaceful temperament makes them "reef-compatible" and able to keep with a variety of other "reef-safe" fish. If kept with non "reef-safe" fish make sure the Cardinalfish are not going to be considered food, for they are a small fish with an adult size of 2". They do well in small groups if a larger tank is availble, and will actually establish a heirarchy within the group without the use of aggression.

The Yellowstriped Cardinal generally is comfortable is water that is between 75-80 degrees F and specific gravity is between 1.021 and 1.026. Generally keep the dKH between 8-12 and the Calcium between 400-450. The Yellowstriped Cardinalfish will do better in tanks that have a nitrate reading less than 20 ppm.

Yellowstriped Cardinalfish Diet

The Yellowstriped Cardinalfish is a carnivore that will feed on pods and other microfauna in the aquarium. Their diet can be supplemented with spirulina, frozen brine shrimp and any pellet or flake food. Any garlic additive will help strengthen their immune system.


Species tend to grow about 2-1/2"

Minimum Tank Suggestion

10 gallons

Ideal water parameters for Yellowstriped Cardinalfish

Marine fish are highly sensitive animals with very specific care requirements. Most all saltwater species will require similar water conditions, designed to replicate that of natural seawater. Ammonia and nitrite levels should absolute zero, temperature at 76F to 80F, and salinity at 1.024 to 1.026. Although some fish are tolerant of lower levels of Nitrate, the goal in every aquariums should be to keep Nitrate as close to zero as possible, and certainly under 20ppm. Finally, maintaining a stable pH of 8.0 to 8.4 is desired. Achieving this is made easier by monitoring alkalinity, which should be kept at 8-12 DKH, and calcium, which is targeted at 400 to 460ppm.

Contributing Members

The following members have contributed to this profile: wake49
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