Land hermit crabs are quirky, low-cost, and fun to watch swap shells and climb. They're often sold as "easy," but they really need warmth, humidity, spare shells, and company to thrive — so they reward families who set their home up properly.
Is a hermit crab a good pet for kids?
Quick answer: Hermit crabs are good pets for the right kid. Land hermit crabs are quirky, low-cost, and fun to watch swap shells and climb.
- 👍 Best for: inexpensive and small, allergy-friendly
- 👀 Keep in mind: need warmth and humidity to survive
- ⏳ Lifespan: 20+ years (up to 40 with great care)
- 💲 Ongoing cost: about $10–$25/mo (setup & vet extra)
📋 Hermit Crab at a glance
Should I get a hermit crab?
💚 Why you'll love a hermit crab
- Inexpensive and small
- Fascinating to watch climb and swap shells
- Allergy-friendly
- Social — keep a small group
⚠️ Things to know
- Need warmth and humidity to survive
- Need both fresh and salt water dishes
- Best kept in groups with spare shells
- Mostly active at night
The honest answer: Yes, but only with the whole setup — three crabs, deep sand, heat, humidity, two water dishes — because these wild-caught animals can outlive the childhood they were bought for.
👍 Get one if…
- You're happy to keep three crabs, not one
- You're a night owl — the tank comes alive after dark
- Your kids love collecting and swapping spare shells
- You're ready to own this tank for decades
👎 Think again if…
- You're bringing home one crab as a souvenir
- You can't give ten gallons per crab
- Your child would dig up a buried, molting crab
- You won't run heat, humidity and saltwater
✅ Am I ready for a hermit crab?
Wanting one and being ready for one are different questions. These are the ones worth answering honestly before you decide — there are no wrong answers, and a "not yet" is a perfectly good result.
Hermit crabs need friends — they're social and should live in groups of 2+. Could you get a few?
- A little crab crew — yes!
- Maybe two
- Just one
If that one gave you pause: Despite the name, hermit crabs hate being alone! Plan for at least two from the start.
Their tank needs tropical humidity (70%+) and warmth, checked with gauges daily. Can you keep a mini beach climate going?
- Daily humidity + temp checks — I'm on it
- Most days
- Sounds like a lot
If that one gave you pause: Plan a "crabitat" with a grown-up: glass tank, deep sand, water dishes, heat, and a humidity gauge you check daily.
How to care for your Hermit Crab
Hermit Crab care in depth
Not the "easy starter pet" they're sold as
Land hermit crabs are marketed as cheap, disposable pets, but cared for properly they can live 20 years or more — and most die young from the wrong setup. They're also wild-caught (they rarely breed in captivity), so the kindest thing is to give the crabs you bring home an excellent life. The essentials most kits leave out: real heat and humidity, deep substrate, spare shells, and company, since they're social animals.
Heat, humidity, and deep sand to molt
Hermit crabs breathe through modified gills and need humidity around 75–85% and warmth (about 75–82°F) to survive — dry air slowly suffocates them. Provide several inches of damp sand (or a sand/coco-fiber mix), because crabs burrow completely to molt and shed their exoskeleton. The golden rule: never dig up a buried, molting crab — disturbing it can kill it. Give both a fresh-water and a salt-water dish (marine salt, never table salt) deep enough to submerge in.
Shells, food, and company
Hermit crabs must move into bigger shells as they grow, so always offer several spare shells of the right size and opening shape — without choices, crabs can get stuck or even fight over shells. Feed a varied diet of commercial crab food plus bits of fresh fruit and veggies. And keep them in small groups, since they're social and far more active with company. They're mostly nocturnal, so the fun happens in the evening.
Hermit crabs are quiet, curious night-owls that wear borrowed shells and can live 10+ years with good care. They're social, so they're happiest with a buddy or two.
✅ Before you bring a hermit crab home
🗓️ Your routine — easy chores to remember
- Check heat and humidity gauges
- Fresh and salt water in the dishes
- A little food
- Remove old food and spot-clean
- Mist to keep humidity up
- Check everyone's accounted for
- Refresh substrate as needed
- Offer new shells to choose from
- Deep-clean the tank (avoid disturbing molting crabs)
💰 Monthly cost: Medium: the crabs are cheap, but the home isn't — a 20-gallon tank, heat, a humidity gauge, deep sand, marine salt, and bigger shells as they grow all add up before the first crab comes home.
🤩 Fun facts about your Hermit Crab
Hermit crabs trade up to bigger shells as they grow.
❓ Common questions about hermit crabs
How much does a hermit crab cost per month?
Plan on roughly $10–$25 per month for food and supplies. Medium: the crabs are cheap, but the home isn't — a 20-gallon tank, heat, a humidity gauge, deep sand, marine salt, and bigger shells as they grow all add up before the first crab comes home.
Are hermit crabs good pets for kids?
They can be — hermit crabs rate 3/5 for kid-friendliness, so they suit gentle, slightly older kids. Gentle, occasional handling over a soft surface — mostly a watch-and-enjoy pet.
How long do hermit crabs live?
Hermit crabs typically live 20+ years (up to 40 with great care). Make sure your family is ready for that commitment before bringing one home.
Are hermit crabs allergy-friendly?
No fur or dander, so allergy-friendly. Wash hands before and after handling.
Should I get a hermit crab?
Yes, but only with the whole setup — three crabs, deep sand, heat, humidity, two water dishes — because these wild-caught animals can outlive the childhood they were bought for. Get one if: You're happy to keep three crabs, not one; You're a night owl — the tank comes alive after dark; Your kids love collecting and swapping spare shells; You're ready to own this tank for decades. Think again if: You're bringing home one crab as a souvenir; You can't give ten gallons per crab; Your child would dig up a buried, molting crab; You won't run heat, humidity and saltwater.
Are hermit crabs easy pets?
They're cheap but not as easy as they're sold to be. Hermit crabs need real warmth, high humidity, deep sand to molt in, spare shells, and company, and with proper care they can live 20 years or more. Poor pet-store setups are why so many die young.
What do hermit crabs need in their tank?
Warmth (about 75–82°F) and humidity around 75–85%, several inches of damp sand to burrow and molt in, both a fresh-water and a marine-salt-water dish, climbing branches, and a selection of larger spare shells.
Do hermit crabs need friends?
Yes — hermit crabs are social and do best in small groups, where they're more active and content. A lone hermit crab is more likely to be stressed and inactive.
Why does my hermit crab bury itself?
Usually to molt — hermit crabs dig down and shed their exoskeleton to grow, staying buried for days or even weeks. Never dig up a buried, molting crab; disturbing it during this vulnerable time can kill it.
🎬 Hermit Crab care videos
Watch beginner-friendly care videos for your hermit crab.
▶ Watch Hermit Crab care videos on YouTube📚 Where this comes from
We check our care advice against vets, animal charities, and government health guidance. Here is what this page is built on.
Vets, charities & official guidance
Keeper & species-community guides
- Is a hermit crab right for you? — Land Hermit Crab Owners Society
- Molting and growth standards — Land Hermit Crab Owners Society
Checked August 2026. These are other people’s websites, and none of it replaces your own vet — if a pet seems unwell, call one.
