Is the Canary Fang Blenny venomous to humans?

Yes. If handled carelessly or squeezed, their bite can cause a painful sensation akin to a mild bee sting. However, it is not considered medically significant to humans unless you have a specific allergic reaction.

Will a Canary Fang Blenny eat my corals or ornamental shrimp?

No, they are entirely reef-safe. They ignore corals, clams, and ornamental invertebrates like cleaner shrimp, focusing exclusively on small zooplankton and prepared meaty foods.

Can I keep more than one Canary Fang Blenny together?

It is strongly advised to keep them singly unless you have a very large aquarium or are absolutely certain you have a mated male-female pair. Two males will inevitably fight.

Why is my blenny constantly swimming in the open water rather than perching on rocks?

This is completely normal behaviour. Unlike bottom-dwelling blenny species, fang blennies possess a swim bladder and naturally hover in the water column to hunt for plankton.

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Canary Fang Blenny

Meiacanthus oualanensis

A brilliantly coloured, highly active mid-water blenny known for its striking yellow hue and fascinating defensive venom.

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Ideal Conditions

Temperature: 24 – 27 °C
pH range: 8.1 – 8.4
Hardness: 8 – 12 dGH
Salinity: 1.02 – 1.026 SG
Adult size: 9 – 11 cm
Minimum recommended volume for a single specimen.: 110 litres+
Lifespan: 4 – 6 years
Diet: Omnivore / Planktivore
Water flow: Moderate
Preferred setup: Reef or fish-only aquarium with ample live rock for shelter and foraging.

About the Canary Fang Blenny

The Canary Fang Blenny is a brilliant yellow, active marine fish that adds a fantastic splash of colour to any reef aquarium. Unlike many blennies that stubbornly perch on rocks or graze on algae, this species is a free-swimming mid-water fish with a fully functional swim bladder. It belongs to the genus Meiacanthus, famously known as fang blennies because they possess venomous canine teeth. Far from being dangerous to their tankmates, they use this feature purely as a deterrent against larger predators.

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Where Canary Fang Blenny comes from

Native range

Western Central Pacific

Countries / regions

Fiji

Habitat

Shallow lagoons and seaward reefs, often found hovering near the substrate or around coral heads.

A notably restricted natural range, being virtually endemic to the waters surrounding Fiji.

Similar species

Striped Fang Blenny
Meiacanthus grammistes
Smith's Fang Blenny
Meiacanthus smithi
Midas Blenny
Ecsenius midas

We’re adding more full species guides as the catalogue grows.

Compatible tank mates

Reviewed guidance based on this species' recorded traits.

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Ocellaris Clownfish
Amphiprion ocellaris
Occupy different niches within the aquarium and are mutually peaceful.
Great
Firefish
Nemateleotris magnifica
A similarly peaceful, reef-safe fish that will happily share the water column.
Great
Skunk Cleaner Shrimp
Lysmata amboinensis
The Canary Fang Blenny is completely reef-safe and will ignore ornamental invertebrates.
Great
Striped Fang Blenny
Meiacanthus grammistes
Species within the same genus can be highly aggressive toward one another unless kept in a very large tank.
Compatible with caution
Panther Grouper
Chromileptes altivelis
Large predators will attempt to swallow the blenny. Although the blenny is venomous, the encounter often kills both fish.
Not recommended

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