Leopard Blenny

Exallias brevis

Saltwater Fish Species Group: Blenny Family: Blenny

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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 Leopard Blenny

General information

The Leopard Blenny, also known as the Starry Blenny, is a popular species among marine aquarium enthusiasts. It has a distinctive, elongated body with a dark brown to black background coloration covered in small white dots or stars. The Leopard Blenny grows up to 4 inches in length and is relatively hardy and easy to care for. It is a peaceful fish that can be kept in community tanks with other non-aggressive species.

Diet & nutrition

The Leopard Blenny is an omnivore and will eat a variety of foods, including algae, small crustaceans, and meaty foods. In captivity, it can be fed a diet consisting of high-quality flake, frozen, and live foods. Supplementing the diet with algae-based foods is recommended.

Determining sex

It is difficult to distinguish males from females in this species.

Breeding & spawning

The Leopard Blenny has not been bred in captivity, and little is known about its breeding and spawning habits.

Diseases

The Leopard Blenny is generally hardy and resistant to diseases. However, it is susceptible to the same diseases as other marine fish, such as marine ich and bacterial infections. Regular water changes and a healthy diet can help prevent disease outbreaks.

Origination

The Leopard Blenny is found in the Western Pacific Ocean, including Japan, Taiwan, and the Philippines.

Cautions

Blenny is not known to be aggressive towards other fish, but it may become territorial towards its own species or similar-looking species. It is also known to nip at stony and soft corals, so it should not be kept in reef tanks.

Acclimation process

Proper acclimation is crucial for the Leopard Blenny to adapt to the new environment. It is recommended to use the drip acclimation method and take at least an hour to acclimate the fish to the new water conditions.

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