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Canary Blenny
Meiacanthus oualanensis
Animalia›Chordata›Actinopterygii›Blenniiformes›Blenniidae
📍 Western Pacific
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.
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.
Tank Mates
Similar peaceful temperament and compatible saltwater requirements; both reef-safe
Small, peaceful, and shares similar feeding habits and water parameters
Peaceful invertebrate that won't compete aggressively; beneficial for tank ecology
Peaceful mid-water swimmer with compatible saltwater requirements
Peaceful benthic species that occupies different zones; non-aggressive
Common Diseases
Ich (Marine Ich)
White spots on body and fins, rapid breathing, flashing against surfaces
Raise temperature gradually to 28-29°C, maintain excellent water quality, use copper-free treatments or UV sterilization; quarantine affected fish
Fin Rot
Frayed or deteriorating fin edges, discoloration at fin bases
Improve water quality and increase water changes; use antibiotic treatments if bacterial; ensure adequate nutrition
Velvet Disease
Fine golden or rust-colored dust on body, lethargy, rapid breathing
Raise temperature to 28-29°C, reduce light exposure, use copper-free treatments; quarantine immediately
Parasitic Infections
Excessive scratching, visible parasites, weight loss, behavioral changes
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