This is a common Caribbean Hermit Crab and is the species the majority of UK hobbyists keep and sold in pet shops. They are easy to tell apart as they have a massive purple claw and they like to use as their name suggests.
They are very easy to keep as long as they have a suitable crabitat and become very active in the early evening especially after the enclosure has been sprayed. Keep them at Temperatures around 23/28°C with 60/80% humidity and diet of 70% fruit / veg as well as 30% meat, as a deficiency may induce cannibalism. They prefer shells with round openings with the various turbo shells being a firm favourite.
Basic Hermit Crab Care Checklist
» Friends- Hermit crabs are social and will get lonely without a friends, best to have at least 3 but the more the better.
» Glass aquarium / Terrarium - 10 gallon is fine but the higher the better.
» Glass cover or screen hood - Help prevent the crabs and humidity escaping.
» Hygrometer - to make sure the tank stays around 70-80% relative humidity.
» Thermometer - to make sure the tank stays around 75-85 degrees F.
» Heat Source: Either using Night glow or Red Night Bulb, a Heat mat may work but keep an eye on the temperature.
» Substrate - Playsand & coco fibre mixed at a ratio of 4:1, at least twice as deep as your largest crab, and kept moist.
» Extra shells – at least 2 of each size needed by your crabs, with round or oval openings the same size as the big pincher – to allow them to grow up, have fun shell-shopping, and to prevent shell fights.
» Food/Water Bowl x 3 - One for Food, Once for freshwater and One for Saltwater both water bowls will need
» Crushed cuttlebone or calcium-powder sprinkled in the food as a calcium supplement.
» Tap water conditioner that removes chlorine, chloramines, and heavy metals.
» Marine salt - for making salt water maintains the proper salinity of their internal and shell water.
» Decor - such as branches, cork bark, driftwood any they can climb around on.
» Hiding shelters - they need a place to feel safe and relieve stress.
Another alternative instead of an aquarium use a large clear storage box (80ltr) which can obtained around 50-60cm high. You would then need to add ventilation holes and heat the box with a heat mat.