Pom Pom Crab - Lybia sp.
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The Pom Pom Crab (Lybia sp.) is a small and captivating invertebrate known for carrying tiny sea anemones in its claws, which it uses for defense and feeding. This fascinating behavior, combined with its tiny size and peaceful nature, makes it a unique addition to reef aquariums.
Common Name: Pom Pom Crab
Scientific Name: Lybia sp.
Family: Xanthidae
Size: Up to 1 inch (2.5 cm)
Temperament: Peaceful
Difficulty: Moderate
Reef Safe: With caution
Native Region: Found throughout the Indo-Pacific, typically inhabiting coral rubble, sandy patches, and shallow reef zones.
Tank Size: Minimum of 10 gallons
Temperature: 74–80°F (23–27°C)
pH: 8.0–8.4
Salinity: 1.023–1.025
Substrate: Live rock and sandy areas; provide crevices for hiding and stable surfaces to attach its anemones.
• Unique Behavior: Carries small sea anemones (“pom poms”) in its claws for protection and feeding.
• Diet: Omnivorous—feed finely chopped meaty foods, mysis shrimp, and micro-pellets; will also benefit from tiny invertebrates and detritus.
• Behavior: Shy and reclusive; best observed in quiet areas of the tank.
• Tankmates: Generally peaceful, but caution with anemone species and very small corals, which may be nipped or disturbed.