Taeniznotus triacanthus
Reef Compatible – With Caution
Care Level – Intermediate
Disposition – Semi-aggressive
Min. Tank Size – 30 gallons
Mature Size – 4 inches
Size Information
| Size Range | Adult Size |
|---|---|
| 1″ to 2″ | Up to 4 inches |
FAQ
Is this fish suitable for a reef tank?
Yes, but with caution. This species is reef compatible only if proper tank conditions and careful monitoring are maintained.
What is the recommended tank size for this fish?
A minimum tank size of 30 gallons is required.
How aggressive is this fish?
The fish is semi-aggressive and may display territorial behavior, especially in smaller tanks or with other fish of similar size.




Jonathan Miller –
I added this fish to my 30-gallon reef tank after researching compatibility. It has been active and healthy for three months. I monitor it closely due to its semi-aggressive nature, but it hasn’t caused any issues with other inhabitants. Good for intermediate reef keepers.
Brian Hodges –
The fish arrived quickly and looks healthy. It’s not overly aggressive, but it does defend its space. I keep it in a well-planted tank with plenty of hiding spots. Works well in a balanced reef setup.
Adrian Ball –
I expected more activity, but it’s calm and doesn’t seem to interact much with other fish. The size range matches the description, and it’s stable in the tank. Not the most dynamic species, but it fits in a moderate-sized setup.