🦀 Electric Blue Hermit Crab (Calcinus elegans)
Vivid Electric-Blue Legs With Black Banding and Orange Antennae • A Valuable Algae and Cyanobacteria Grazer • Needs Regular Access to Spare Shells as It Grows
 
📋 The Electric Blue Hermit Crab, also known as the Dwarf Blue Leg Hermit or Tiny Blue Leg Hermit, has vivid electric-blue legs marked with black banding, bright orange antennae, and roughly equal-sized brownish-green claws.
It comes from a wide range across the Indo-Pacific, including areas of Hawaii, the Red Sea, and the Great Barrier Reef, inhabiting coral reef environments, occupying abandoned snail or triton shells for shelter. Every Electric Blue Hermit Crab we ship is feeding well.
A valuable addition to any cleanup crew, this species actively grazes on algae, including nuisance green hair algae and cyanobacteria, while also sifting through the sand to provide beneficial aeration. This species needs regular access to new, larger empty shells as it grows, without an adequate supply, it may resort to attacking and killing a live snail to claim its shell. Aside from this shell-related behaviour, it's fully reef safe and peaceful toward corals, fish, and other invertebrates. It reaches up to 5cm, so a 40L tank suits it well.
 
💡 Highlights
🎨 Electric Blue Legs With Black Banding: A vivid, popular cleanup crew member
🌿 Algae and Cyanobacteria Grazer: A valuable natural pest controller
🏖️ Sand Aeration: Sifts through substrate as it forages
🐚 Needs Spare Shells: May attack snails for shells if none are available
🌿 Fully Reef Safe: Won't harm corals, fish, or other invertebrates