Red Leg Hermit Crab - Paguristes sp.
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The Red Leg Hermit Crab (Paguristes sp.) is a hardy and active marine invertebrate, prized for its vibrant red legs and algae-cleaning behavior. This peaceful crab is an excellent addition to reef aquariums, helping maintain clean rockwork and substrate.
Common Name: Red Leg Hermit Crab
Scientific Name: Paguristes sp.
Family: Diogenidae
Size: Up to 1.5 inches
Temperament: Peaceful
Difficulty: Easy
Reef Safe: Yes
Native Region: Found throughout the Indo-Pacific, commonly inhabiting sandy and rubble substrates near coral reefs.
Tank Size: Minimum of 10 gallons
Temperature: 74–80°F (23–27°C)
pH: 8.0–8.4
Salinity: 1.023–1.025
Substrate: Sand and live rock with plenty of crevices for hiding and foraging.
• Algae Control: Actively grazes on algae, detritus, and uneaten food.
• Behavior: Peaceful and active; may change shells as it grows.
• Diet: Omnivorous—accepts algae, meaty foods, and detritus.
• Tankmates: Compatible with most reef fish and invertebrates; avoid aggressive predators that may harm the crab.