Blackline Blenny, Captive-Bred

Greek Name: Meiacanthus nigrolineatus



The Blackline Blenny is also known as the Blackline Fangblenny, and is bred in captivity in the USA. All blennies in the Meicanthus genus possess a venomous bite which is used as a defense in the event of being taken in by larger fish. When they bite the inside of the fish’s mouth they are then spit out and are spared the loss of their lives. The fish are green and yellow in color and have a number of black marks that are lateral to the fish. The non-venomous Red Sea Mimic Blenny (Ecsenius gravieri) has evolved to mimic the appearance of this species. This aids in the survival of the species because predatory fish often do not bother them. This is why the Blackline Blenny is a peaceful fish and makes a stunning feature in any community aquarium.
Usually found in crevices and rocks on the bottom of their habitat the Blackline Blenny requires an aquarium minimum of 10 gallons and scattered rocks for perching and hiding. They are usually peaceful in the wild and are considered to be reef-safe.


Diet of the Black-Lined Blenny needs to include meaty items like vitamin enriched brine and mysis shrimp, chopped pieces of shrimp and fish, and high quality flake food.


Approximate Size of Purchase Small 1 1/2″ up to 2 1/2″ Medium 1 1/2″ up to 2 1/2″


Care Level




Color Form

Black, Blue, Yellow



Reef Compatible


Water Conditions

sg 1.020-1.025, 72-78° F, dKH 8-12, pH 8.1-8.4

Max Size






Minimum Tank

30 gallons


Blackline Blenny Information

The Blackline Blenny, Meicanthus nigrolineatus, features a small blue and yellow body with a thick black horizontal line going from its eye to its tail. They are tough and can be kept alongside other peaceful fish as well as other blennies, dartfish, or gobies. They are also reef safe fish.

Diet of the Blackline Blenny

This blenny should be positioned toward the bottom of the tank seeking out algae to feast during meals. The diet should include meaty items like mysis shrimp, vitamin enriched brine shrimp and mysis along with spirulina, seaweed, marine algae, and algae-based meals three times a day.

Additional information


Large, Medium, Small

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