FAQs

How can I tell if a shell is the right size for my hermit crab?

Observe if your hermit crab can fully retract into the shell with its legs and claws tucked in snugly. If the shell is too large or small, it may cause stress or hinder movement, so aim for one that allows a comfortable fit without excess space.

Is it safe to use painted or decorated shells for hermit crabs?

No, painted or decorated shells can be harmful because the chemicals in paints or adhesives may leach into the environment and poison your hermit crab. Always opt for natural, untreated shells to ensure their safety and well-being.

What should I do if my hermit crab refuses to change into a new shell?

Ensure you’re offering a variety of clean, appropriately sized natural shells to give them options, as refusal can stem from stress or unsuitable choices. Monitor their behavior and environment for issues like humidity or temperature, and be patient, as they may change when ready.

The Final Word on Shell Selection

Choosing the perfect shell is a deeply personal process for your crab, guided by an instinctual checklist of weight, interior space, and opening shape. The best thing you can do as a caretaker is to provide a generous and varied collection of natural, species-appropriate shells for them to explore. By observing your crabs and ensuring they always have appealing options, you directly support their well-being and satisfy their most fundamental needs.

Further Reading & Sources

• The importance of various shell characteristics to the shell-selection behavior of hermit crabs – ScienceDirect
• Hermit Crab Shell Selection
• Shell selection behaviour of hermit crabs – ScienceDirect