Acanthurus Tristis
Reef Compatible: Yes
Care Level: Intermediate
Disposition: Semi-aggressive
Min. Tank Size: 75 gallons
Mature Size: 10 inches
Specifications
| Parameter | Value |
|---|---|
| Species | Acanthurus Tristis |
| Reef Compatible | Yes |
| Care Level | Intermediate |
| Disposition | Semi-aggressive |
| Minimum Tank Size | 75 gallons |
| Mature Size | 10 inches |
FAQ
What is the typical behavior of Acanthurus Tristis in a reef tank?
Acanthurus Tristis is semi-aggressive and may display territorial behavior, especially when establishing dominance. It is generally compatible with reef environments but should be housed with adequate space and compatible tank mates.
How big does Acanthurus Tristis grow in a home aquarium?
The mature size of Acanthurus Tristis is approximately 10 inches, so a tank of at least 75 gallons is recommended to allow for proper growth and swimming space.
Is Acanthurus Tristis suitable for beginners?
No, this species is considered intermediate in care level and requires stable water conditions, proper tank setup, and a well-maintained environment. Beginners may find it challenging to manage.

Nicholas Dickens –
The Acanthurus Tristis has been in my 80-gallon tank for six months and is active and healthy. It doesn’t damage corals and spends most of its time grazing on algae. I’ve had to monitor its behavior closely, but it’s stable and adds visual interest.
Boris Knox –
It’s a good addition to a reef tank with proper space. I noticed it gets territorial during feeding times, so I added a few larger rocks to create visual barriers. Overall, it’s a solid choice for intermediate reef keepers.
Carol Tucker –
The fish arrived healthy and has been active since setup. I’m still adjusting to its semi-aggressive nature, especially with smaller fish. It’s not aggressive toward corals, but I recommend a larger tank.