Green Canary Blenny

The Green Canary Blenny – or Tonga Canary Blenny – can liven up your aquarium in more ways than one…

Take a look at why this colorful, overlooked fish can make a surprisingly wonderful addition to any tank large or small.

The Green Canary Blenny (Meiacanthus tongaensis)

Green Canary Blenny
Green Canary Blenny (Meiacanthus oualanensis)

If you’re a nano tank owner, then you probably realize how hard it is to find active fish for your aquarium.

Most small fish spend most of their time either perching, hovering, or hiding. And for good reason — in the wild their small size makes them easy targets for predators.

But fang blennies such as the Green Canary Blenny are one of the few exceptions…

Fang blennies have two small, venomous, fang-like teeth inside their mouth. If a large fish tries to swallow them, they use them to bite the inside of the attacker’s mouth.

As a result, they are rarely bothered by other fish and are very comfortable swimming about out in the open.  In fact, that is how they spend the vast majority of their time.

At 5 inches of length or less, this makes them colorful, active additions for any saltwater aquarium that is 24 gallons or more.

It is this trait that also makes them wonderful additions for large aquariums with big, aggressive fish.

Larger fish know they’re in for a nasty bite if they try to attack the Green Canary Blenny – or any other fang blenny. So they tend to leave them alone.

And fang blennies are confident enough in their ability to defend themselves that they don’t feel a need to hide or stay close to cover when they are placed in a tank with larger fish.

Here’s the rub though…

Most people hear the words ‘fang’ blenny, or ‘venomous bite’ and often mistake it to mean they’ll get a nasty bite whenever they put their hands in their tank.

Nothing could be further from the truth.

The only time the Green Canary Blenny – or most any other fang blenny – will bite a finger is if you try to catch them by hand.

They are very peaceful and make a colorful and active addition to most any aquarium.

They are reef compatible.

And they get along with most other fish.

However, they do NOT get along with other fang blennies.  Do not put more than one fang blenny in a tank unless it is a mated pair.

Minimum Tank Size: 24 gallons
Care Level: Moderate
Temperament: Semi-aggressive
Reef Compatible: Yes
Water Conditions: 72-78° F, dKH 8-12, pH 8.1-8.4, sg 1.020-1.025
Max. Size: 5″
Color Form: Green, Yellow
Diet: Omnivore – finely chopped crustacean flesh, mysis, or meaty frozen foods such as Reef Frenzy or Rod’s Food.