Thursday, May 4, 2023

How to Care for Hermit Crabs

A beginner’s guide on handling, feeding, and housing the cutest crustaceans out there

Hermit crabs, affectionately called hermies, are phenomenal low maintenance pets. But low maintenance doesn’t mean no maintenance! These cute little crabs need an adequate habitat and plenty of supplies, and we’re here to cover everything you need to know to keep these critters happy and healthy. Read on to learn how to care for hermit crabs.

[Edit]Things You Should Know

  • Hermit crabs are social and thrive in environments with multiple other crabs.
  • Keep the humidity at least 75% and the temperature at all times to ensure your crabs stay healthy.
  • Fill your crab’s habitat with children’s playsand, cocofiber, moss, empty shells, freshwater, saltwater, and climbing toys.

[Edit]Steps

[Edit]Setting Up a Healthy Habitat

  1. Get a glass tank that’s for every 2 crabs. So, if you have 6 hermit crabs, they’ll need at least of space. A proper home for your crabs should hold humidity but still let in fresh air, so a fish tank or reptile aquarium usually does nicely. You can even rinse out that old leaking tank from the attic and use it! Acrylic terrariums tend to work too.[1]
    Care for Hermit Crabs Step 1 Version 3.jpg
    • If the hermit crabs are on the larger size, opt for a bigger tank than necessary.
    • Hermit crabs like having plenty of space, so bigger is always better with the habitat.
    • You can theoretically even keep your crabs in a big plastic bin, if you’re really short on materials.
  2. Maintain a humidity of roughly 75% at all times. Get a a hygrometer (humidity gauge) and stick it in the crabs’ habitat to track the humidity. Whenever the humidity gets too low, mist their cage with a little water. Hermit crabs breathe through hardened gills, and can't breathe properly unless the air is humid enough, so keep them moist at all times.[2]
    Care for Hermit Crabs Step 2 Version 3.jpg
    • A great way to increase your tank's humidity naturally is to add natural moss to your tank.[3] It increases the humidity, and hermit crabs love to snack on it it.
    • Damp crab sponges are also a great way to keep the humidity high in a hermit crab tank.[4]
  3. Keep the temperature roughly at all times. Hermit crabs are tropical animals who prefer warm temperatures. Attach a tank thermometer to your crabs’ home to monitor the temps. Use an under-tank heater designed for hermit crabs, or set the tank in a part of your home that stays perpetually warm, too.[5]
    Care for Hermit Crabs Step 3 Version 3.jpg
    • Heat damage is irreversible, and temperatures that are too low can slow down a crab's metabolism, so maintaining a stable temperature is essential.
  4. Fill the habitat with a substrate of kid’s playsand or cocofiber. Hermit crabs are diggers, and they’ll spend a lot of time under or in the substrate you choose. As such, pick something fine and safe. Your two best options are the playsand designed for small children, coconut fiber, or a mix of the two. Cover the bottom of your tank with substrate.[6]
    Care for Hermit Crabs Step 4 Version 3.jpg
    • Many crabs also like to bury and even molt in damp reptile moss.
    • Aim to keep the substrate depth 3 times the height of your biggest crab. So, if you estimate your biggest crab is tall, keep the substrate deep.
  5. Set some climbing toys out for your hermit crabs. You may be surprised to learn that hermies love to climb! In the wild, they will climb large rocks exposed by low tide to search for food. Hermit crabs are sometimes called “tree crabs” because they’ll even climb trees to eat insects and vegetation. Just stay away from painted toys, since they can be toxic to hermit crabs.[7]
    Care for Hermit Crabs Step 6 Version 3.jpg
    • Natural rocks and seashells that you pick up at the beach are great to scatter around the crabitat. Clam shells even make great food dishes! Just make sure to boil them in boiling water so that they become sterilized before you place them in the tank.
    • Plastic plants made for reptiles are great for crabs to climb and hide in. Just remember to use the lid of your tank so the crabs can't climb out.
    • Never use reptile “half pine logs,” as pine is an irritant to the crabs and can be toxic.[8]
  6. Provide your hermit crabs with plenty of hiding places. Hermit crabs, like most animals, need a place to feel secure and hide when they feel threatened. You can use a half coconut shell that they sell at pet stores for small crabs, or use broken pots, large shells, etc. Just make sure that the crab won't get stuck inside.[9]
    Care for Hermit Crabs Step 7 Version 3.jpg
  7. Add some live plants to your tank if you’d like. Live plants can be a great addition to any tank. In particular, plants like bamboo (make sure it's real bamboo and not Dracaena Sanderiana, which is sold as “lucky bamboo”), Venus fly traps bromeliads (air plants), pothos, and spider plants are among the other safe plants. Be forewarned--your hermit crabs may snack on them, so there's no guarantee the plants will have time to grow.[10]
    Care for Hermit Crabs Step 8 Version 3.jpg
    • You do not need to include live plants if you don’t want to; your hermit crabs will be just fine without them. They do provide some fun snacks for the crabs and add some beautiful decoration, though!
  8. Provide your hermies with clean freshwater and saltwater at all times. Provide at least two water dishes (one freshwater and one saltwater) for your crabs. Hermit crabs need to balance the salinity of the water in their shells; the dishes should be at least deep enough that your crab can get water in its shell. A good way to do this is to provide them with a sloping water area, where one part is shallow and easy to climb out of, while the other is deep and they can submerge themselves in the water.[11]
    Care for Hermit Crabs Step 9 Version 3.jpg
    • Never use tap water. Either use bottle spring water, or boil the tap water first before giving it to your crabs. The minerals and chlorine in tap water are bad for hermit crabs.
    • For your saltwater, use salt designed for marine fish. Never use salt intended for human consumption because the anti-caking agents can be harmful. Aim for a ratio of 1.5 tsp (8 g) of salt for every 1 cup (1/4 L) of water.

[Edit]Caring for Your Crabs

  1. Replace the substrate every 6 months or so. Dirty substrate can lead to mold which can be harmful to your hermit crabs. Change it every 6 months or whenever their habitat starts to smell a little questionable. If you see mold or you spot a mite infestation, change the substrate ASAP. In between substrate cycles, spot clean any dung and food the crabs have dragged from the food bowl or buried.[12]
    Care for Hermit Crabs Step 5 Version 3.jpg
    • Never clean the substrate when your hermit crab is molting. You should never disturb or move a molting crab.
  2. Handle your hermies with extreme care and patience. Hermit crabs normally get kind of twitchy when you touch them, so go slow. When you get your hermit crabs, leave them in the tank for a few days. Once your crabs don’t shy away from you, try putting your hand down near them to see if they’re interested. Let your hermit crab explore your hand and get used to you.[13]
    Care for Hermit Crabs Step 12 Version 2.jpg
    • Once you get them home, they go through a “de-stressing” period that can take as little as a few days and as long as two months. During this time, change out their food and water regularly and do not disturb them.
    • Your crabs probably won’t like being held, but many hermit crabs will learn to tolerate handling if you go slow and you don’t make a lot of sudden movements.
  3. Let your hermit crabs molt in undisturbed peace. If a crab digs under the substrate for a couple of weeks, don't worry. It’s molting! Do not disturb your crab during this time. They need to be alone and if they are bothered, the stress could kill them. A crab's exoskeleton gets tight as they grow, and molting is how they solve this problem. They shed their exoskeleton and grow a new one, so let them be.[14]
    Care for Hermit Crabs Step 11 Version 4.jpg
    • Don't take the exoskeleton away from the crab! They will need to eat it in order to harden their new exoskeleton when they’re done.
    • If your crab behaves like they’re sick, don't panic. Keep an isolation tank in a closet with enough substrate to dig under completely and ample food and water. Crabs often act sick when they’re about to molt, so the odds are good they’re fine.
  4. Set out multiple extra shells to give your crabs options. When hermit crabs grow, they look for bigger shells. Keep plenty of extra hermit crab shells similar to your crabs' sizes in the tank at all times; they’ll go around and look for new housing as they see fit. Once a month or so, rotate a few undisturbed shells out with different styles of shells.[15]
    Care for Hermit Crabs Step 14 Version 2.jpg
    • Purple Pincher Hermit Crabs prefer the shells with round, circular openings. They will choose circular openings over the oval openings. Ecuadorian Hermit Crabs will prefer an oval opening, because they have flatter abdomens.
    • Only buy natural, sterilized shells—never buy painted shells! Although companies may claim the paint is safe, the paint can chip off, and if the crabs eat it, it can be toxic.[16]
  5. Feed your crabs a varied and healthy diet of hermit crab food. Hermit crabs are scavengers by nature and will eat almost anything. Provide a base diet of commercial hermit crab food. Any high-quality product will work so long as it’s designed for hermit crabs.[17]
    Care for Hermit Crabs Step 15 Version 2.jpg
    • Hermit crabs love fresh shrimp, freeze-dried krill, blood worms, and other seafood. You can normally buy these fishy foods at your local grocery store.
    • If you cook, set aside a piece of steak or chicken, non-marinated to grill lightly for the crabs. They enjoy raw meat!
    • If you have more than 20 crabs or so, get a fish head from a local fish market as an occasional treat.
  6. Offer fruits and veggies to your hermit crabs to keep them healthy. Aside from eating meat, hermit crabs also love different fruits and vegetables. Remember to change their food almost every day or night. Hermit crabs love to bury their uneaten food, and this can cause molding and is messy.[18]
    Care for Hermit Crabs Step 16 Version 2.jpg
    • Hermit crabs love fresh fruit like pineapple, apple, pears, grapes, cantaloupe, watermelon, mango, papaya, strawberries, bananas, etc. Wash your fruit thoroughly before you cut it, to avoid pesticides.
    • Crabs will go crazy for coconut shavings!
    • Hermit crabs will also eat natural peanut butter on whole wheat toast, hard boiled eggs, egg shells (boiled), and popcorn (plain, unsalted and unbuttered).
    • Avoid anything from the Allium species of plants (onion, garlic, etc.).
  7. Be aware that hermit crabs may pinch. While they generally pinch only when they are afraid or feel cornered, they may pinch for no reason, so don’t take it personally if your hermie gets a little snappy from time to time. If they pinch, just gently turn your hand over in the tank and let gravity gently drop the crab off of your hand.[19]
    Care for Hermit Crabs Step 18 Version 2.jpg

[Edit]Video

[Edit]Tips

  • Hermit crabs can't breed without special equipment, so feel free to mix male and female crabs in your tank. They can’t mate in captivity unless you put them in a colossal tank that simulates the ocean near-perfectly.[20]

[Edit]Things You'll Need

  • Habitat with lid
  • 2 water dishes
  • Hiding spots for tank
  • Extra shells
  • Substrate
  • Climbing toys
  • Thermometer
  • Hygrometer
  • Tank heater

[Edit]Related wikiHows

[Edit]References

[Edit]Quick Summary



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