Ochrestriped Cardinalfish

Ostorhinchus compressus

Saltwater Fish Species Group: Cardinalfish Family: Apogonidae

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Water parameters

Temp 76-80 F Temperature

Maintaining a stable and appropriate temperature is critical for the survival of aquatic life.

pH 7.8 - 8.4 potential of Hydrogen

Measuring the acidity or alkalinity of water on a 0–14 scale, where 7 is neutral, 7 is alkaline.

NO3 1-20 ppm Nitrate

While less toxic than ammonia, high nitrate levels (above 40–80 ppm) are important to monitor because they can cause fish stress, stunted growth, and harmful algae blooms.

NO2 <0.0001 ppm Nitrite

It is a highly toxic, intermediate compound in the nitrogen cycle produced from broken-down ammonia

PO4 0.01 - 0.1 ppm Phosphate

It is essential for plant development but must be managed, as excess levels trigger nuisance algae blooms and inhibit coral calcification.

NH3 <0.1 ppm Ammonia

It is the primary killer of aquarium fish, causing gill damage, stress, and death

Ca 380 - 450 ppm Calcium

Supporting the growth, skeletal structure, and shell formation of corals, mollusks, crustaceans, and coralline algae

KH 8 - 12 dKH Alkalinity

It acts as a shield, neutralizing acids to prevent dangerous pH "crashes" that can harm fish, corals, and plants.

Mg 1200 - 1400 ppm Magnesium

It enables coral growth by supporting skeletal formation, assists in metabolic processes, and ensures that calcium is available for corals, clams, and coralline algae.

SG 1.023 - 1.026 SG Salinity

Essential for maintaining stable, natural water parameters, proper osmoregulation, and stress-free environments for marine fish and corals

ORP 250 - 400 mV Oxidation-Reduction Potential

A higher positive mV indicates clean, oxygen-rich water with high water quality, while low readings indicate high pollution.

About Ochrestriped Cardinalfish

General information

The Ochrestriped Cardinalfish is a small saltwater fish that can grow up to 3 inches (7.6 cm) in length. It has a yellow or gold body with horizontal black stripes and a yellow tail. They are peaceful and social fish, and they can be kept in small groups in aquariums. They are hardy and easy to care for, making them a popular choice for beginner aquarists.

Diet & nutrition

The Ochrestriped Cardinalfish is a carnivore and primarily feeds on small crustaceans and plankton in the wild. In captivity, they can be fed a varied diet consisting of frozen or live brine shrimp, mysis shrimp, and other small meaty foods. It is important to feed them small amounts several times a day instead of one large feeding to prevent overfeeding and ensure they get enough nutrition.

Determining sex

It is difficult to determine the sex of Ochrestriped Cardinalfish by physical appearance alone. However, during spawning, the male fish will have a more slender body, and the female will have a rounder belly.

Breeding & spawning

Ochrestriped Cardinalfish are known to spawn in captivity, and they are egg-layers. Spawning usually occurs at dusk or dawn, and the female can lay up to 50 eggs at a time. The eggs are adhesive and will stick to rocks or plants. The male will guard the eggs until they hatch, which usually takes about a week.

Diseases

Ochrestriped Cardinalfish are generally hardy fish and not prone to many diseases. However, they can still be affected by common saltwater fish diseases such as ich or velvet. It is important to keep their environment clean and healthy to prevent diseases from spreading.

Origination

Ochrestriped Cardinalfish is found in the Indo-Pacific region, including the waters of the Maldives, Sri Lanka, and the Philippines.

Cautions

Ochrestriped Cardinalfish are generally peaceful and not aggressive towards other fish or invertebrates. However, they may become territorial towards their own kind or other similar-looking fish species. It is important to provide plenty of hiding places and space to prevent aggression.

Acclimation process

When introducing Ochrestriped Cardinalfish to a new aquarium, it is important to acclimate them slowly to prevent shock or stress. Float the bag with the fish in the aquarium water for 15-20 minutes to allow them to adjust to the temperature. Then, open the bag and add small amounts of aquarium water to the bag every 5-10 minutes for about an hour. Finally, use a net to transfer the fish into the aquarium.

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