Here are some more facts about hermit crabs, according to Google:
Hermit crabs don’t grow their own shells. Instead, they inhabit empty shells of other mollusks for protection.
As they grow, they must find larger shells, leading to a constant search and sometimes even fights over suitable homes.
Despite their “hermit” name, they are often social creatures, living in groups.
Hermit crabs undergo molting, shedding their exoskeleton to grow larger. This process leaves them vulnerable until their new exoskeleton hardens.
There are over 800 species of hermit crabs, found in both aquatic and terrestrial environments.
Both aquatic and terrestrial hermit crabs use gills to breathe. Terrestrial hermit crabs have adapted gills that allow them to extract oxygen from the air, but they still require moisture.
They will often gather in groups, and line up according to size, and exchange shells. This is done to make sure everyone has a shell that fits.
Bonus info!
Here are some more facts about hermit crabs, according to Google: