Zebra Hermit Crab

Geographical Origin and Habitat: Primarily distributed in the Central Pacific, particularly around the Hawaiian Islands. Inhabits rocky coastlines, reef flats, and wave-swept intertidal tide pools.

Taxonomy: Member of the family Diogenidae. A dwarf hermit crab species reaching about 2-3 cm. Features a compact body with robust walking legs adapted to strong wave action.

Social Behavior: Very peaceful, social, and active. Gathers in large colonies in rocky tide pools. Spends all day grazing on algae and organic films covering reef rocks.

Coloration and Sexual Dimorphism: Characterized by distinct zebra-like longitudinal black and white (or dark brown and cream) stripes on its walking legs. No visible sexual dimorphism.

Tank Setup: Suitable for small nano reefs of 5 gallons or larger. Provide plenty of live rock for climbing. Small empty gastropod shells must be added to allow growth.

Diet and Feeding: Herbivore and detritivore. Consumes green hair algae, film algae, diatoms, and leftover fish food. Accepts spirulina wafers and sinking pellets.

Water Quality: Stable marine parameters: SG 1.020-1.025, pH 8.1-8.4, temperature 22-28°C. Highly sensitive to copper treatments and elevated nitrates.

Compatibility and Tankmates: 100% reef-safe. Perfect Clean-Up Crew (CUC) member. Compatible with peaceful fish and corals. May occasionally target small live snails if empty shells are lacking.

Aquarium Breeding: Microscopic larval stages are pelagic and complex, and do not survive standard home aquarium filtration systems.

Risks and Diseases: Low iodine or calcium leading to failed molts. Lack of suitable replacement shells causes high stress. Highly sensitive to copper treatments.