Tank Mates: Orange Firefish~Tangaroa Goby~Target Mandarin
Info from Advanced Aquarist's Online Magazine: There is a wide variety of hue and pattern within the genus. The distinctive coloration, accentuated by their sleek body shape, makes for an exceptionally attractive animal.
Blennies are widely appreciated for their abundance of charm; fang blennies are no exception here. They are rather busy and inquisitive, and appear to be very aware of their surroundings. Unlike many of their blenny brethren, they have functional swim bladders and spend much time moving about in open water. While they can be somewhat cryptic, they are generally far less secretive and skittish than other blenniids. Probably, much of their apparent self-assurance is derived from their possession of an especially potent defensive apparatus.
The two enlarged, grooved canine teeth for which fang blennies get their name are situated in the lower jaw. Unlike other fang blenny genera, Meiacanthus usually employs its weaponry only to defend itself or its territory. When seriously threatened, it will open its jaws wide to bear its teeth. Each "fang" is equipped with venomous buccal glands. Venom is delivered with pressure to the glands. While not especially dangerous to most people, fang blenny bites can be quite painful. Fortunately, because of its small mouth, envenomation of humans by this animal is unlikely. That being said, one should never attempt to hand capture or hand feed a fang blenny.
Some fang blennies can be successfully kept in tanks as small as 10 gallons, but will be most comfortable when housed in enclosures of 20-30 gallons or more. They do not require any special care. They will, however, appreciate an abundance of rocky caves and crevasses. They can be quite jumpy, so a tight-fitting lid is highly recommended.
As ornamental fish, fang blennies of the genus Meiacanthus have it all--sturdiness with elegant good looks, individual character with great adaptability, peacefulness with the ability to stand up to aggressors. Owing to their diminutive size, they are appropriate for many smaller aquaria. The relative ease with which they can be cultured might make them especially attractive to breeders. Captive bred specimens of common fang blennies (e.g., Meiacanthus oualanensis) are now widely available; the availability of captive bred specimens of less common fang blennies (e.g., Meiacanthus tongaensis) will likely increase in the near future; it is entirely plausible that even presently unavailable species (e.g., Meiacanthus geminatus) will be produced on a commercial scale in years ahead. Come what may, these fishes undoubtedly will hold the interest of marine aquarium hobbyists for a very long time.