Disco (Smithi) Blenny Proaquatix
Meiacanthus smithi – The Disco or Smith’s Fangblenny is a small, peaceful, reef safe blenny. It is venomous, but don’t let that scare you off. Those fangs are strictly a defensive tool against predators, not something they typically use on people, your other fish, or your coral, but it’s why nothing in your tank wants to mess with it. Predatory fish learn fast that this one isn’t worth the trouble, so it tends to swim around with a confidence that’s way out of proportion to its small size.
Unlike some of the more territorial blennies out there, Smith’s Fangblenny is genuinely peaceful. It won’t harass tankmates, won’t bother your corals or inverts, and does just fine in a mixed reef community. It’s also a strong swimmer that spends more time cruising the water column than resting on the substrate.
Key Features
| Feature | Detail |
|---|---|
| Species | Meiacanthus smithi |
| Size | Small, typically 2-3 inches |
| Behavior | Peaceful, active, reef-safe |
| Compatibility | Works well in mixed reef tanks |
| Venom | Defensive only; harmless to humans and tank inhabitants |
FAQ
Is the Smith’s Fangblenny safe for a reef tank?
Yes, the Smith’s Fangblenny is reef-safe and does not harm corals or inverts. It is peaceful and avoids aggressive interactions with tankmates.
Does it pose a danger to other fish?
The blenny is venomous, but only uses its fangs defensively against predators. It does not attack other fish or inverts and is safe in a community tank.
How active is this fish?
It is a strong swimmer and spends most of its time moving through the water column rather than staying on the substrate.


Stewart Kerr –
Added the Smith’s Fangblenny to my 120-gallon reef tank last month. It’s very active and doesn’t seem to bother any of the corals or other fish. The small size and calm demeanor make it a great addition to a mixed community. No issues with aggression or territorial behavior.
Lillian Parr –
This blenny has been in my tank for three months now. It swims freely throughout the water column and doesn’t interfere with any of the invertebrates. Very peaceful and easy to care for. The venom is not a concern since it’s only defensive.
Dorothy Parr –
I was a bit nervous about the venom, but after a week, I realized it’s just a natural defense. It doesn’t attack anything. It’s active and adds a nice movement to the tank without causing stress to other species.