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FishbeginnerSaltwater

Canary Blenny

Meiacanthus oualanensis

AnimaliaChordataActinopterygiiBlenniiformesBlenniidae

📍 Western Pacific

Ask Finn

Vivid canary-yellow blenny from the fang blenny group. Unlike most blennies, it's an open-water swimmer. Possesses mildly venomous fangs for defence but won't use them unless threatened. Hardy, peaceful, and reef-safe.

Size4.5"
Min Tank30g
peaceful
Zonemid

Care Guide

Diet

Canary Blennies are omnivorous zooplankton feeders that thrive on a varied diet of high-quality marine flakes, small pellets, and frozen foods like mysis shrimp, brine shrimp, and copepods. Feed small portions once daily, offering only what they can consume in a few minutes. Supplement with occasional vegetable matter such as nori sheets to ensure balanced nutrition.

Behavior

This blenny is an active, open-water swimmer unlike most benthic blennies, displaying curious and peaceful behavior toward tankmates. They are hardy and confident fish that spend time both in the water column and near the substrate, constantly foraging for food. While possessing mildly venomous fangs, they are non-aggressive and only use them defensively if severely threatened.

Breeding

Breeding Canary Blennies in captivity is difficult and rarely achieved in home aquariums. They require very specific environmental conditions and pair bonding that are challenging to replicate. Success is primarily limited to advanced aquarists with dedicated breeding setups and knowledge of their natural spawning behaviors.

Common Diseases

Ich (Marine Ich)

Symptoms

White spots on body and fins, rapid breathing, flashing against surfaces

Treatment

Raise temperature gradually to 28-29°C, maintain excellent water quality, use copper-free treatments or UV sterilization; quarantine affected fish

Fin Rot

Symptoms

Frayed or deteriorating fin edges, discoloration at fin bases

Treatment

Improve water quality and increase water changes; use antibiotic treatments if bacterial; ensure adequate nutrition

Velvet Disease

Symptoms

Fine golden or rust-colored dust on body, lethargy, rapid breathing

Treatment

Raise temperature to 28-29°C, reduce light exposure, use copper-free treatments; quarantine immediately

Parasitic Infections

Symptoms

Excessive scratching, visible parasites, weight loss, behavioral changes

Treatment

Quarantine fish, use appropriate antiparasitic treatments, maintain pristine water conditions

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Quick Facts

pH
8.1–8.4
diet
omnivore/zooplankton
maxSize
4.5 inches
salinity
SG 1.020–1.025
minTankSize
30 gallons
temperature
75–82°F (24–28°C)

Temperature

75–82°F

24–28°C

Stats

Community tips0
Kept by0 hobbyists