How long can hermit crabs hold there breath?

Hermit crabs don't actually hold their breath in the same way that mammals do. They use their gills to breathe, and those gills need to be moist to function. This means that hermit crabs need to be in water or a very humid environment to breathe properly.

Here's the breakdown:

* Short periods underwater: Hermit crabs can stay submerged for short periods of time (minutes) while foraging or exploring in their natural habitat.

* Land-based breathing: On land, hermit crabs rely on their gills staying moist. They do this by carrying a small amount of water in their shells.

* Not holding their breath: Unlike mammals, they don't have lungs and don't "hold their breath" in the traditional sense. Their breathing is a constant process of keeping their gills moist.

It's important to note: Hermit crabs need a moist environment to survive. If their gills dry out, they can die. This is why it's crucial to provide them with appropriate humidity and access to water in captivity.