Black Saddleback Clownfish (Amphiprion polymnus)
Reef compatible: Yes
Care level: Intermediate
Disposition: Semi-aggressive
Minimum tank size: 30 gallons
Mature size: 5 inches
Product Specifications
| Feature | Detail |
|---|---|
| Species | Amphiprion polymnus |
| Size (Adult) | 5 inches |
| Size (Available) | XL (3″ to 4″) |
| Reef Compatibility | Yes |
| Behavior | Semi-aggressive |
| Minimum Tank Size | 30 gallons |
FAQ
Is this clownfish suitable for a reef tank?
Yes, the Black Saddleback Clownfish is reef compatible and can coexist with coral and other reef-safe species.
What is the expected mature size of this fish?
The mature size of this clownfish is approximately 5 inches.
Is this fish aggressive toward other fish?
It has a semi-aggressive disposition and may display territorial behavior, especially during feeding or when defending its space.


Carl Parsons –
The fish arrived healthy and active. It has adapted well to my 40-gallon reef tank. It doesn’t harm corals and is more peaceful than expected. I appreciate the clear labeling and accurate description.
Abigail Allan –
It’s a beautiful fish with a distinctive black saddle pattern. I’ve kept it with other peaceful fish and it hasn’t shown aggression. Only needs a bit of space to feel secure.
Hannah Coleman –
Great addition to my tank. The size is within the XL range as described. It’s active and curious, and it’s not overly aggressive. I’m happy with the purchase.