Absolutely. Marine hermit crabs (saltwater hermit crabs) also, like the land hermit crab, have a soft abdomen that is not protected by a hard exoskeleton, so they scavenge shells from snails as they grow to wear for protection.
The marine hermit crab will also shed it's exoskeleton as it grows. This is a very fast process, taking only a few hours to a day compared to the molting process of the land hermit crab, which can take several days to a few months.
in saltwater
Hermit crabs are considered to be in the arthropods family. Hermit crabs have a hard exoskeleton made of chiton which helps provide protection and give the muscles attachment support. Although a hermit crab will grow, their exoskeleton does not so they must constantly shed said exoskeleton in favor for a new one that it grows into.
There is only one main difference between hermit crabs and barnacles. Hermit crabs have a hard exoskeleton that protects their bodies.
nothing without salt
hermit crabs should not be put with other animals and your hermit crab needs a better home. Glad i could help p.s 35cm wide tanks can hold 3 hermit crabs
Although I do not recommend keeping hermit crabs from the ocean, yes you need saltwater. They are salt water creatures.
no they do not have an internal skeleton in order to grow they switch their shells
Hermit crabs do not have backbones. They are invertebrates, with hard exoskeletons that protect their bodies. (However, the exoskeleton does not cover its soft abdomen.)
Crabs shed their exoskeleton to get more space. It usually means that they have grown out of their shells.
No, land hermit crabs will not eat their own legs that have fallen off due to stress, a fight, or injury. Only when they molt will they eat their legs with the rest of the exoskeleton.
The kind of hermit crabs most people think of are Land Hermit Crabs. They live on land, and need at least enough water to submerge themselves. Land Hermit Crabs do need sea salt to keep their body chemistry balanced, and as such, need access to both salt and fresh water. Marine Hermit Crabs require a full saltwater aquarium to survive. Such tanks are elaborate, and should be researched thoroughly before purchase. Saltwater pets of all sorts are often regarded as difficult to care for.
No, when they molt their underground, so they get out of their shell, molt, get back in their shell and eat the exoskeleton. You have to let them eat it because it has the nutrients it needs.