Pom-Pom Crab: The Tiny Boxer of the Reef Tank
The Pom-Pom Crab (Lybia tesselata), also known as the Boxer Crab, is a captivating and unique invertebrate that adds a touch of personality and an unusual dynamic to any marine aquarium. This intriguing crab is easily identified by its small size and stunning, tessellated body. Its most defining characteristic is its unique symbiotic relationship with a pair of tiny anemones, which it holds in its claws. The crab uses these “pom-poms” for both defense and feeding, waving them in a comical manner that resembles a boxer. It is a very peaceful and shy species that is completely reef-safe and will not harm corals, clams, or other invertebrates.
Why Choose the Pom-Pom Crab?
- Peaceful and non-aggressive behavior
- Reef-safe and compatible with most marine setups
- Unique appearance with anemones held in claws
- Engaging and entertaining presence in the tank
| Specification | Value |
|---|---|
| Species | Lybia tesselata |
| Size | 2.5 to 4 cm (1 to 1.5 inches) |
| Lifespan | 5 to 7 years |
| Water Temperature | 24–28°C (75–82°F) |
| Water pH | 8.1–8.4 |
| Compatibility | Reef-safe, peaceful |
FAQ
Is the Pom-Pom Crab suitable for a beginner marine aquarium?
Yes, the Pom-Pom Crab is well-suited for beginner marine aquarists due to its peaceful nature and reef-safe behavior.
Can the Pom-Pom Crab live with corals and other invertebrates?
Yes, it is completely reef-safe and will not harm corals, clams, or other invertebrates.
How does the Pom-Pom Crab interact with its anemones?
The crab holds its anemones in its claws and uses them for defense and feeding. It waves them in a natural, comical motion resembling a boxer.

Adrian Roberts –
The Pom-Pom Crab is a delightful addition to my reef tank. It’s shy at first but quickly becomes a regular sight waving its anemones. No aggression, no damage to corals. A unique and charming pet.
Michelle Rutherford –
I was skeptical about adding a crab, but this one is peaceful and fascinating. It interacts with the anemones in a way that’s both cute and natural. Perfect for a reef tank.
Sonia Hardacre –
It’s a little small and takes some time to settle in, but once active, it’s a real highlight. I love how it moves and waves its ‘pom-poms’. No issues with other tank inhabitants.