Why Hermit Crabs May Not Be Good Pets for Kids

Updated on August 12, 2019
fritteritter profile image

I have enjoyed owning a hermit crab and so have my kids, but they are a lot more work than you would think.

Hermit crabs make fantastic pets, but you may want to avoid getting one for your child. Without the proper care—which goes well beyond clean food and water—pet hermit crabs are disappointing and live a short life struggling to survive.

This article will help you learn more about keeping them as pets and will dispel some common myths that you may have heard from friends or pet store employees. In this article, we will take a look at:

  • What your child wants
  • What you want
  • What the pet store wants
  • What makes a good children's pet
  • Why hermit crabs can be great for kids
  • Recommended websites
  • Recommended products

Hermit crabs make great pets, but only with the proper care.
Hermit crabs make great pets, but only with the proper care.

If Your Child Wants a Hermit Crab

Hermit crabs can make good pets, but there is a lot to consider before buying one for your kids. Let's take a look at hermit crabs and pets in general through the eyes of a young child.

Your child wants to play with the crab every day.

  • Hermit crabs need to be able to bury themselves entirely without disruption as part of their growing process. In order to grow, they have to molt or shed their tough exoskeleton, a process which will take a week or longer and may happen as often as every month. During this time, the crab will not be able to move. So, for several weeks, your child's patience will be put to the test—handling the crab during this sensitive time will almost certainly kill it. Molting takes longer (several weeks or months) but is also less frequent as the crab becomes larger.
  • Several inches of moist beach sand is the perfect bedding for them (enough to cover your largest crab by at least 2 inches). Gravel, stone, and dry sand do not allow them to dig, so just get playground or beach sand and keep it at "sandcastle building consistency." It is also good to add a coconut fiber product such as Eco Earth to the sand to hold the moisture.

Your child sees a SpongeBob shell with legs.

  • They will need to leave their brightly painted shell to grow and stay healthy. Find a pet store with hermit crabs in natural shells and your child will be more likely to develop an attachment to the animal instead of the shell.
  • Provide a selection of shells that are the same size and slightly bigger than the one currently occupied by your crab. Avoid specialty shells, as your child may want to force the crab into a particular shell, and painted shells are not healthy for them.
  • The crab will select its new shell by rolling the candidates around, inspecting inside and out, until the most comfortable shell is found, and there is no safe way to force one to use or discard a particular shell.

Your child wants a carry-around pet.

  • You will need to teach your child how to handle a hermit crab. If held improperly, teased, or forced to come out of its shell, they may pinch and not let go. Keeping your hand taut reduces their ability to grab on, and maintaining a steady walking surface will keep them from being startled. Pick a crab up by the corners of its shell and hold your other hand under the shell to provide support when the crab comes out.
  • A small plastic container is portable, but it is not adequate housing for one. For two small crabs, you will need, at a minimum, a 5 or 10-gallon glass aquarium, 3–6 inches of sand, and two water bowls. See the proper care section for more details. A smaller plastic "travel tank" is okay for show-and-tell but it cannot satisfy the housing needs of the crabs.

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Hermit crabs are happiest when they have friends.Hermit crabs like to hide and are most active at night, so they aren't always the most interesting pets to show to friends.
Hermit crabs are happiest when they have friends.
Hermit crabs are happiest when they have friends.
Hermit crabs like to hide and are most active at night, so they aren't always the most interesting pets to show to friends.
Hermit crabs like to hide and are most active at night, so they aren't always the most interesting pets to show to friends.
It is important to provide extra shells that are the proper size for your hermit crabs.
It is important to provide extra shells that are the proper size for your hermit crabs.

If You Want One for Your Child

You may have heard that hermit crabs are fun, easy to care for, and inexpensive. This is often true, but you must first do the research, then decide if it is the right choice.

Are you looking for a low-maintenance "throwaway pet?"

Hermit crabs can be relatively low-maintenance, but they have strict housing and care requirements. They will not live more than a year without meeting these requirements, whereas ones living under proper care can live 10 years or longer. They should never be considered as "throwaway pets."

You should be prepared to buy more than one.

Hermit crabs are social creatures, and they do not do well when alone. Buying two instead of one ensures that they will have a friend and you will also get more use out of the shells and food that you purchase.

Hermit crabs enjoy digging and must do so to survive. Be sure to provide enough moist sand for digging.
Hermit crabs enjoy digging and must do so to survive. Be sure to provide enough moist sand for digging.

If a Pet Store Employee Suggests One

Many pet stores sell and promote hermit crabs as good pets for children with little care requirements and short life expectancies. As you have already learned, that's not the whole story.

The pet store wants you to buy all the hermit crab supplies and toys.

Many products marketed directly for use with them are either unnecessarily expensive or improper for use with hermit crabs. You can buy hermit crab supplies, such as sea sponges at a craft store, beach or playground sand at a hardware store, and coconuts at a grocery store for a fraction of the cost.

What Makes an Animal "Good for Children?"

Consider the following when choosing a pet for your child, then check out some of the best pets for children:

Health risks

  • Salmonella and other bacteria present a very serious risk for young children.
  • Reptiles, amphibians, and birds are particularly high-risk, while hermit crabs do not carry any known human diseases.
  • Know your child's allergies.

Care requirements

  • Give your child the responsibility to care for the animal, but be prepared to share some of the tasks.
  • In addition to food, some animals need special lighting, water care, and dietary supplements.

Secondary and recurring costs

  • A fish itself may cost less than a dollar, but don't overlook the cost of the aquarium, food, gravel, lighting, filter, and decorations!
  • Some animals, like most reptiles, need live food which can be expensive, smelly, and may have its own requirements.
  • Will the animal need new supplies as it grows? Iguanas are infamously bad childhood pets for this reason.


  • There is no such thing as a "throwaway pet." With proper care and provision, most pets can live long lives as your child grows and becomes more responsible.
  • If your child's pet dies, research the proper care of the animal instead of simply buying a replacement. This is an opportunity to teach your child about life and to help them learn more about their pet.

Pets Are a First-Hand Lesson in Responsibility

Which animal makes the best pet for children?

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Hermit Crabs Can Be Great Pets for Children!

If you are prepared to properly care for a few hermit crabs, they can be excellent pets! Here are just a few reasons why you may decide, after researching and ensuring that you can care for them, to buy hermit crabs as pets for your children:

  • They're not aggressive—friendly and fun if handled properly.
  • They are disease-free—they do not carry human diseases, and do not need to go to the vet.
  • They are hypo-allergenic, meaning they're a safe pet for children with allergies.
  • They have a long lifespan, so hermit crabs can grow with your child.
  • They have a small appetite, which means very low food and supplement costs.
  • No live food is required and dried, and fresh foods are easier to keep.

© 2009 fritteritter

Reader comments

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    • profile image


      12 months ago

      My hermit crab lost three legs and one claw

    • profile image


      13 months ago

      Why does my hermit crab cut its sponge

    • profile image


      22 months ago

      Hermit crabs do not pose a salmonella risk. This article has some false information. Please join Hermit Crab owners on Facebook for better information about crabs and the care of them.

    • profile image

      Dan the man 

      24 months ago

      This article is very helpful!

    • profile image


      24 months ago

      I'm about to have a hermit crab named cuddles and this article was very helpful to me and I can't wait to see cuddles tomorrow!! So thank you pet helpful! I have two questions though are painted shells okay for hermit crabs? and how do you keep the the cage humid? Well thanks again bye!!!

    • profile image


      24 months ago

      This article is very helpful since I'm new to having a hermit crab. My little sassy the hermit crab is going to be loved but have privicy to!

    • profile image


      2 years ago

      this article is amazing because it tells the best things even about pet stores.

    • profile image


      2 years ago

      This was super helpful and definitely helped me and my parents decide on if to get it or not!!!

    • profile image


      2 years ago

      Wow I'm just finding out about these articles. Comment below and let me know if you have read theese recently

    • profile image


      5 years ago

      good website thank you also I was wondering if I could maybe have 2 hermit crabs in a 10 gallon tank?

    • profile image


      5 years ago

      wow this is good stuff I think I may be getting 2 hermit crabs soon not sure but now I got the idea of how to care for them THANKS!!!!!!

    • profile image


      5 years ago

      very good information to know I am considering getting 2 hermit crabs to put in my 10 gallon tank.

    • profile image

      Feline Pet Store 

      7 years ago

      I believe that every kid should have the opportunity to own a pet. Dogs and cats make great pets and you don't have to buy one from a pet store. Adoption of a needy dog or cat is always a good option

    • profile image


      7 years ago

      The moral of this story; Sadly, most people are dumb and lazy, and just want a pet to distract their kid for a few seconds, so they do not have be a parent. This is a living thing, not a videogame. Treat hermit crabs with some respect.

    • profile image


      7 years ago

      i dont know if ill get 2 of theese little guys. i have a 5 gal tank. but thx great article

    • Shaddie profile image


      7 years ago from Washington state

      I like this article but it's unfortunate you bash pet store employees near the end. Having worked at Petsmart for 4 years, my "team" and I were very obsessed with letting unwary families know just how much care these animals require. But most customers don't want to hear the truth, they don't read the material we hand them, and they disregard our warnings and instructions. Being a responsible, knowledgeable pet store employee is a thankless job, and we usually get nothing but complaints from both customers, who only want to hear what they want to hear, and scoffing pet experts, who assume everyone working at a pet store is an uneducated jerk.

      Anyway... Great hub with lots of accurate information. I agree that hermit crabs, and many other pet store animals, make horrible first, second, or third pets for children.

    • profile image


      7 years ago

      This article was very informative, thank you, now i know many more things on how to take care of shelly!

    • jamiesweeney profile image


      7 years ago from Philadelphia, PA

      Glad to visit this page. Great article.

    • profile image


      8 years ago

      I love dogs becuse they come in all sizes and shapes and are loyal and friendly they also like playing and love anyone so I think a dog or puppy! are the very best pets and Im just 8!

    • profile image


      9 years ago

      Great article but the molting you should put a little more empasses on

    • profile image

      hermys owner 

      9 years ago

      this really helped!!! Thanks

    • profile image

      Book Scorpion 

      9 years ago

      Thank you for this informative article, it's so nice to see accurate information on hermit crabs for a change :)

    • profile image


      9 years ago

      Very informative. Thanks!

    • profile image


      9 years ago

      This article is fantastic!

      It's not everyday you find someone posting about the proper care of a hermit crab.

      Kudos! (:


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