Stichodactyla mertensii Carpet Anemone
Reef compatible: Yes
Care level: Expert-only
Disposition: Aggressive
Minimum tank size: 50 gallons
Mature size: 20 inches
Placement in tank: Low
Light level: High
Water flow: Medium
Specifications
| Parameter | Value |
|---|---|
| Size (L) | 6″ to 8″ |
| Reef Compatible | Yes |
| Care Level | Expert-only |
| Disposition | Aggressive |
| Minimum Tank Size | 50 gallons |
| Mature Size | 20 inches |
| Placement | Low |
| Light Level | High |
| Water Flow | Medium |
FAQ
Is this anemone suitable for beginners?
No, this anemone requires expert-level care and is not recommended for beginners due to its aggressive nature and specific environmental needs.
What lighting and water flow conditions are required?
High light levels and medium water flow are required for optimal growth and health.
Can it coexist with other reef inhabitants?
It is reef compatible but may be aggressive toward other species; careful tank selection and placement are essential.



Brian Hemmings –
This anemone has grown well in my 55-gallon tank with high light and medium flow. It’s active and colorful, though it does move around aggressively. I’ve had to be careful with other corals, but it’s a striking addition to the display.
Rachel Johnston –
Installed it after extensive research. It’s not easy to maintain, but once established, it’s a beautiful carpet anemone. I keep it in a low area with strong lighting and monitor its interactions closely.
Nicola Watson –
It survived the first few weeks, but it was aggressive and scared away a nearby shrimp. I’m not sure if it’s a good fit for a mixed reef. Would recommend only for experienced aquarists.