Purple Flat Anemone (Heteractis crispa) – Size L (5″ to 6″)
The Purple Flat Anemone, scientifically known as Heteractis crispa, is a striking and visually appealing species suitable for reef aquariums.
Reef Compatible: Yes
Care Level: Intermediate
Disposition: Semi-aggressive
Minimum Tank Size: 30 gallons
Mature Size: 20 inches
Placement in Tank: Low
Light Level: Moderate
Water Flow: Moderate
| Feature | Detail |
|---|---|
| Species | Heteractis crispa |
| Size (Adult) | 20 inches |
| Size (Available) | 5″ to 6″ |
| Light Requirement | Moderate |
| Water Flow | Moderate |
| Compatibility | Reef compatible |
| Behavior | Semi-aggressive |
FAQ
Is the Purple Flat Anemone safe to keep with other reef inhabitants?
Yes, it is reef compatible, but due to its semi-aggressive disposition, it may interact with or potentially harm smaller or more delicate invertebrates. Monitor tank inhabitants closely when introducing this anemone.
What is the recommended tank size for this anemone?
A minimum tank size of 30 gallons is required to provide adequate space and stability for the anemone to thrive.
How much light and water flow does this anemone need?
It requires moderate light levels and moderate water flow to maintain health and optimal coloration.

Olivia Bond –
The Purple Flat Anemone arrived healthy and vibrant. It has settled well in my 40-gallon tank with moderate lighting. It’s active and colorful, though I noticed it gently touches nearby corals. I keep a close eye on it, and it hasn’t caused any damage yet.
Phil Avery –
Great addition to my reef tank. It’s been a few months now and still looks bright and lively. I provide moderate lighting and moderate flow. It’s not overly aggressive, but it does extend tentacles toward nearby invertebrates occasionally.
Stewart Morrison –
I was cautious about adding a semi-aggressive species, but this anemone has adapted well. It’s beautiful in color and stays in the lower area of the tank. I appreciate the clear care instructions provided.