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 a good pet 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: up to 10+ years (with great care)
- 💲 Ongoing cost: about $10–$25/mo (setup & vet extra)
📋 Hermit Crab at a glance
Is a hermit crab right for you?
💚 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
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 10+ years — 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 70–80% 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: Low: a tank, heat, humidity, and a supply of bigger shells as they grow.
🤩 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. Low: a tank, heat, humidity, and a supply of bigger shells as they grow.
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 up to 10+ years (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.
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 over 10 years. 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 70–80%, 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
