Yellow-tipped Hermit Crab

Geographical Origin and Habitat: Highly common throughout the tropical Indo-Pacific, from East Africa and the Red Sea to Australia, Polynesia, and southern Japan. Inhabits rocky shorelines and tide pools.

Taxonomy: Member of the family Diogenidae. Small hermit crab species growing to around 3 cm in total length. Has a robust body and prefers gastropod shells with round openings.

Social Behavior: Peaceful, active, and highly gregarious. Forms very large groups along the intertidal shoreline. Excellent climber that active explores live rocks.

Coloration and Sexual Dimorphism: Walking legs are dark olive-green, greenish-brown, or almost black. Characterized by pale yellow, cream, or white tips on the claws and legs. No visible sexual dimorphism.

Tank Setup: Suitable for tanks of 8 gallons or larger. Provide plenty of live rock for climbing and algae grazing. Empty gastropod shells of various sizes must be added to allow growth.

Diet and Feeding: Herbivore and detritivore. Highly efficient at eating green hair algae, film algae, diatoms, and cyanobacteria. 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.