Yellow Cardinalfish
Ostorinchus luteus
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 HydrogenMeasuring the acidity or alkalinity of water on a 0–14 scale, where 7 is neutral, 7 is alkaline.
NO3 1-20 ppm NitrateWhile 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 NitriteIt is a highly toxic, intermediate compound in the nitrogen cycle produced from broken-down ammonia
PO4 0.01 - 0.1 ppm PhosphateIt is essential for plant development but must be managed, as excess levels trigger nuisance algae blooms and inhibit coral calcification.
NH3 <0.1 ppm AmmoniaIt is the primary killer of aquarium fish, causing gill damage, stress, and death
Ca 380 - 450 ppm CalciumSupporting the growth, skeletal structure, and shell formation of corals, mollusks, crustaceans, and coralline algae
KH 8 - 12 dKH AlkalinityIt acts as a shield, neutralizing acids to prevent dangerous pH "crashes" that can harm fish, corals, and plants.
Mg 1200 - 1400 ppm MagnesiumIt 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 SalinityEssential for maintaining stable, natural water parameters, proper osmoregulation, and stress-free environments for marine fish and corals
ORP 250 - 400 mV Oxidation-Reduction PotentialA higher positive mV indicates clean, oxygen-rich water with high water quality, while low readings indicate high pollution.
About Yellow Cardinalfish
General information
The Yellow Cardinalfish, also known as the Yellowstripe Cardinalfish or Yellowstriped Cardinalfish, is a popular species in the aquarium trade. They have a yellow body with a black spot on their dorsal fin. They can reach up to 3 inches in length and are relatively easy to care for in a reef aquarium.
Diet & nutrition
In the wild, Yellow Cardinalfish are known to feed on small crustaceans and plankton. In an aquarium setting, they can be fed a variety of foods including frozen or live brine shrimp, mysis shrimp, and other small meaty foods. It's recommended to feed them multiple times per day in small amounts.
Determining sex
Determining the sex of Yellow Cardinalfish can be difficult as there are no external differences between males and females. One way to potentially differentiate them is by observing their behavior during breeding. Males may be more aggressive and territorial during this time.
Breeding & spawning
Yellow Cardinalfish are known to spawn in captivity. They are egg layers and will lay their eggs on a flat surface in the aquarium. Once the eggs hatch, the fry can be fed newly hatched brine shrimp.
Diseases
Yellow Cardinalfish are relatively hardy and not particularly prone to any specific diseases. However, as with all aquarium species, they can be susceptible to stress-related illnesses if their water quality is poor or if they are not fed a balanced diet.
Origination
Yellow Cardinalfish are found throughout the Indo-Pacific, from the Red Sea to the western Pacific Ocean.
Cautions
Yellow Cardinalfish are generally considered safe for reef aquariums. However, they may be eaten by larger predatory fish.
Acclimation process
It's important to properly acclimate Yellow Cardinalfish to their new environment to reduce stress and increase their chances of survival. This can be done by slowly adding small amounts of water from the aquarium to their transport bag over the course of 30-45 minutes before releasing them into the aquarium.
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