Polkadot Hermit Crab

Polka Dot Hermit Crab - Dardanus megistos

The Polka Dot Hermit Crab is a large and eye-catching marine invertebrate recognized for its bright red legs covered in distinctive white spots and its massive scavenging claws. Reaching an adult size of approximately 6 inches including shell, this active hermit crab is constantly exploring rockwork and substrate in search of food. While highly entertaining and hardy, the Polka Dot Hermit Crab is opportunistic and may prey on snails, smaller hermit crabs, and unsecured invertebrates as it grows. Its bold coloration and active personality make it a standout addition to larger aggressive or predator marine systems.

The Polka Dot Hermit Crab thrives in large marine aquariums with stable rockwork, open substrate, and plenty of room to roam. A minimum tank size of 75 gallons is recommended due to its eventual size and heavy-bodied nature. This species should be added only to systems with compatible tankmates and durable aquascaping, as larger individuals may move loose decorations or corals while foraging.

As an omnivorous scavenger, the Polka Dot Hermit Crab requires a varied diet of meaty and algae-based marine foods to support growth and molting. Offer PE Mysis, Hikari Brine Shrimp, Ocean Nutrition Clams on the Half Shell, Julian Sprung’s Sea Veggies, and New Life Spectrum Algae Pellets regularly for balanced nutrition.

Approximate product size: 1-2"

We maintain a rigorous, veterinarian-approved quarantine program that includes proactive treatments, careful observation, and daily monitoring to ensure the highest standards of fish health. Our biosecurity practices reduce the risk of any cross-contamination between systems, meaning our fish are ready for your display tanks.