Description
Blue-Legged Hermit Crab – Clibanarius tricolor
Clibanarius tricolor, commonly known as the Blue-Legged Hermit Crab, is a small and highly active cleanup-crew invertebrate valued for its algae-grazing behavior and vivid coloration. This species is easily recognized by its electric blue legs accented with black striping and contrasting red antennae. Constantly on the move, Blue-Legged Hermits patrol rockwork and substrate in search of algae, detritus, and leftover food, making them both functional and visually appealing additions to reef aquariums.
Origin: Maldives (Indian Ocean)
Depth: Intertidal to shallow reef zones (0–10 m / 0–33 ft)
Lighting: Not demanding; comfortable under standard reef lighting
Flow: Low to moderate; prefers calm areas where it can forage effectively
Tank Placement: Substrate and rockwork; frequently climbs rocks and crevices
Temperature: 74–80°F (23–27°C)
Salinity: 1.023–1.026 SG
pH: 8.1–8.4
Diet: Omnivorous scavenger – consumes algae, detritus, and leftover fish food; supplemental feeding recommended in low-nutrient systems
Temperament: Generally peaceful but opportunistic; may prey on snails if insufficient empty shells are available
Size: Up to 2.5 cm (1 inch)
Care Level: Easy – hardy and well suited for most reef aquariums
Compatibility: Reef-safe; compatible with corals and most fish; provide a variety of empty shells to minimize aggression toward snails
