Squareback Anthias (Female) – Size: L 3″ to 4″
Pseudanthias Pleurotaenia
Reef Compatible: Yes
Care Level: Intermediate
Disposition: Semi-aggressive
Min. Tank Size: 100 gallons
Mature Size: 8 inches
| Specification | Detail |
|---|---|
| Species | Pseudanthias Pleurotaenia |
| Gender | Female |
| Size (Adult) | 3″ to 4″ (L) |
| Reef Compatibility | Yes |
| Behavior | Semi-aggressive |
| Minimum Tank Size | 100 gallons |
| Mature Size | 8 inches |
FAQ
Is this anthias suitable for a reef tank?
Yes, the Squareback Anthias is reef compatible and can coexist with coral in a properly maintained reef environment.
What is the expected adult size of this fish?
The mature size of this female Squareback Anthias is approximately 8 inches.
Is this fish aggressive toward other fish?
It has a semi-aggressive disposition and may display territorial behavior, especially in smaller tanks or with similar-sized fish.

Tim Russell –
Added a female Squareback Anthias to my 100-gallon reef tank. She’s active and adds color without being overly aggressive. She’s adapted well to the environment and doesn’t bother the corals. Good choice for intermediate reef keepers.
Abigail Lambert –
The fish looks beautiful and fits well in the tank. I noticed she’s slightly more active during the day and tends to stay near the back wall. No issues with the reef community so far.
Stephen Hudson –
Great addition to my reef setup. She’s calm most of the time, only showing mild aggression when defending her space. Tank size is sufficient, and she’s thriving after a few weeks.