Pearlscale Butterflyfish

Chaetodon xanthurus

Saltwater Fish Species Group: Butterflyfish Family: Chaetodontidae

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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 Pearlscale Butterflyfish

General information

Pearlscale Butterflyfish (Chaetodon xanthurus) is a species of marine fish belonging to the family Chaetodontidae. They are typically found in the Western Atlantic, ranging from Florida to Brazil, and throughout the Caribbean. Pearlscale Butterflyfish can grow up to 7 inches in length, and are known for their beautiful pearlescent scales and vibrant coloration.

Diet & nutrition

Pearlscale Butterflyfish are omnivores and primarily feed on a diet of small invertebrates, including crustaceans, mollusks, and worms. In captivity, they can be fed a varied diet of frozen or live foods such as brine shrimp, mysis shrimp, and chopped squid. It is important to provide a varied diet to ensure that they receive all of the necessary nutrients.

Determining sex

It is difficult to distinguish between male and female Pearlscale Butterflyfish.

Breeding & spawning

There is limited information on the breeding and spawning habits of Pearlscale Butterflyfish in captivity.

Diseases

Pearlscale Butterflyfish are susceptible to common marine fish diseases such as ich, marine velvet, and fin rot. It is important to maintain good water quality and to quarantine any new additions to the aquarium to prevent the spread of disease.

Origination

Pearlscale Butterflyfish are native to the Western Atlantic, ranging from Florida to Brazil, and throughout the Caribbean.

Cautions

Pearlscale Butterflyfish are generally peaceful and can be kept with other non-aggressive fish species. However, they may be territorial towards other butterflyfish or fish that resemble them.

Acclimation process

When introducing Pearlscale Butterflyfish to a new aquarium, it is important to acclimate them slowly to prevent shock. The drip acclimation method is recommended, where water from the aquarium is slowly added to the bag containing the fish over a period of 1-2 hours.

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