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Hermit crabs breathe air through modified gills, not lungs. Those gills pull oxygen straight from the air, but only while they stay damp. That single requirement is why a hermit crab can suffocate in a room full of air, and why most tank deaths trace back to one number on a gauge. Do Hermit Crabs…
Yes, hermit crabs have blood, but it looks nothing like ours. Theirs is a pale blue fluid called hemolymph, and it carries oxygen using copper where our blood uses iron. The strange part is that it is not always blue. The color comes and goes inside the body, and there is one moment when an…
Here is the twist: a coconut crab is actually a type of hermit crab – a giant one. The big difference is that a coconut crab grows so large it stops carrying a borrowed shell, while your pet hermit crab keeps its shell for life. Coconut crabs can weigh up to 9 pounds with a…
Hermit crabs live all over the world, mostly along warm tropical coastlines, oceans, and beaches. Some live fully in the sea, while others live on land near the shore. The exact spot depends on the type of crab – marine crabs stay in the water, and land crabs live close to it. Here is a…
Hermit crabs likely have basic feelings, but not complex emotions like humans. Science shows they can feel stress, fear, discomfort, and pain, and they react to good and bad experiences. What they almost certainly do not feel are deep emotions like love, jealousy, or sadness the way we do. So your crab can feel scared…
No, hermit crabs are not true crabs – despite the name. They are close cousins of crabs, but scientists put them in a separate group nicknamed the “false crabs”. In fact, hermit crabs are just as closely related to squat lobsters as they are to the crabs at the seafood counter. So why do they…
Yes, hermit crabs have brains – but not the kind you might picture. Instead of one large central brain like a human, a hermit crab has a small brain in its head plus a chain of nerve clusters called ganglia spread through its body, each acting like a mini-brain controlling nearby parts. What is truly…
You can tell a hermit crab is molting when it eats and drinks more, digs constantly, grows sluggish, develops a gray molt sac on its belly, and finally buries itself underground. Molting is the natural process where a crab sheds its old exoskeleton and grows a bigger one – a healthy, normal part of its…
If your hermit crab has buried itself, stopped moving, and you are starting to worry – relax. It is almost certainly molting, a completely normal process where the crab sheds its old outer skin and grows a new, larger one underneath. It looks alarming the first time, but it is actually a sign your crab…
Hermit crabs need shells because they are born with a soft, curved, unprotected abdomen – they lack the hard exoskeleton that covers true crabs. To survive, they move into abandoned snail shells and carry them as mobile homes. The shell protects them from predators, stops them from drying out by keeping their gills moist, and…
With proper care, hermit crabs can live 15 to 25 years, and some have reached 40 years or more. That is far longer than most people expect – these are decades-long companions, not short-term pets. Sadly, many hermit crabs die within months of being bought, but that is almost always due to poor care, not…
Hermit crabs do not sip or lap water like a dog or cat. Instead, they scoop it up with their small claws and pass it to tiny hair-like parts near their mouth that soak the water in. From there, the water travels to their gills, which must stay wet at all times so the crab…