Can hermit crabs eat walnuts?


Hermit crabs are fascinating creatures that are beloved by hobbyists and pet owners alike. These quirky crustaceans have a lot to offer, but they are often misunderstood and improperly cared for. As dedicated caretakers of hermit crabs worldwide, we believe that understanding their diet is essential in providing the best possible care for these unique pets. One question that may come to mind regarding their diet is: can hermit crabs eat walnuts?

Diet of Hermit Crabs

Before we dive into the topic of walnuts, it's essential to understand the natural diet of hermit crabs. In the wild, hermit crabs are omnivores, which means they eat both plant and animal matter. Their varied diet can include fruits, vegetables, nuts, seeds, algae, insects, and even small fish. As pet owners, it's crucial to replicate this diverse diet to keep our hermit crabs healthy and happy.

Can Hermit Crabs Eat Walnuts?

The short answer is: yes, hermit crabs can eat walnuts. Walnuts are a natural, healthy, and nutritious snack for your hermit crab to enjoy. They are high in proteins, healthy fats, vitamins, and minerals, which are all essential components of a healthy diet for hermit crabs. However, there are a few things you need to keep in mind when feeding walnuts to your hermit crabs.

Preparing Walnuts for Hermit Crabs

It's important to properly prepare walnuts before feeding them to your hermit crab. Following these steps will ensure your hermit crab remains safe and healthy while enjoying this tasty treat:

  1. Choose natural, unsalted walnuts: Make sure to provide your hermit crab with unsalted, raw walnuts, without any added flavors or preservatives. Some commercial nuts are salted, sweetened, or processed, which can be harmful to your hermit crab.

  2. Remove the shell: You have to remove the hard shell of the walnut, as it is too tough for hermit crabs to eat. Make sure to remove any sharp edges and fragments to prevent your hermit crab from getting injured.

  3. Chop or crush the walnut: Chop the walnut into small pieces or crush it into a fine powder. This will make it easier for your hermit crab to eat and digest the walnut.

Moderation is Key

Although walnuts are a nutritious and delicious snack for hermit crabs, they should be fed in moderation. Walnuts should only make up a small portion of your hermit crab's diet, as too many can cause health issues due to their high fat content. It's essential to provide a variety of foods to prevent nutritional imbalances.

Other Healthy Food Options for Hermit Crabs

Hermit crabs thrive on a diverse and balanced diet. In addition to walnuts, you can provide your hermit crab with other healthy food options, such as:

  • Fruits and vegetables (e.g., apples, bananas, carrots, spinach)
  • Dried seaweed (nori)
  • Insects (e.g., crickets, mealworms)
  • Fish and shrimp (freeze-dried or frozen and thawed)
  • Calcium supplements (e.g., crushed eggshells, cuttlebone)


As a caretaker of hermit crabs, it's important to be informed about their needs and provide them with proper care and attention. Walnuts can be a nutritious and enjoyable addition to your hermit crab's diet, but remember to always feed them in moderation, alongside a variety of other foods to maintain a balanced and healthy diet.

By understanding the unique dietary requirements of hermit crabs and dedicating ourselves to their well-being, we can ensure that these charming creatures thrive in our care, providing us with joy and delight for years to come.

FAQ Blog Section: Hermit Crab Diet

Can Hermit Crabs Have Walnuts?

Yes, walnuts are safe for hermit crabs, and they can be a nutritious addition to your pet's diet. Packed with proteins, healthy fats, vitamins, and minerals, walnuts provide a great source of energy. However, it's important to ensure the walnuts are unsalted and unseasoned.

What Kind of Fruits Can Hermit Crabs Eat?

Hermit crabs love variety in their meals, and various fruits are a great way to introduce some diversity into their diet. Some popular fruit options for hermit crabs include:

  • Apples (seedless and peeled)
  • Grapes (seedless)
  • Berries (blueberries, raspberries, blackberries)
  • Banana
  • Mango (without the pit)
  • Melons
  • Papaya
  • Coconut

When serving fruit to your hermit crab, make sure it's fresh and free from any chemicals or pesticides, and always wash it thoroughly. Cut the fruit into small pieces that are easy to hold and eat.

Do Hermit Crabs Need Vegetables in Their Diet?

Yes, vegetables are an essential part of a hermit crab's diet. Vegetables provide additional nutrients and fiber that are important for their overall health. Some vegetables that can be offered to your hermit crab include:

  • Leafy greens (kale, spinach, collard greens)
  • Carrots
  • Bell peppers
  • Sweet potatoes
  • Cabbage
  • Zucchini
  • Pumpkin
  • Broccoli

Be sure to wash and cut the vegetables into small, manageable pieces, and remove any seeds or pits. You can serve the veggies raw or boiled, but make sure they are cooled down before offering them to your hermit crab.

How to Create a Balanced Hermit Crab Diet?

Aside from insects, fruits, and vegetables, hermit crabs need several other nutrients to stay healthy. Here are some items to include in a balanced hermit crab diet:

  • Seeds like chia, pumpkin, and sesame
  • Seafood (fresh or freeze-dried, e.g., shrimp, fish, krill)
  • Unsweetened dried fruits (goji berries, mango, pineapple, raisins)
  • Cuttlebone or crushed oyster shell for calcium
  • Pelleted commercial food made specifically for hermit crabs

When creating a meal plan, try to vary the food choices to ensure they get a wide range of nutrients. Offer appropriate portion sizes, and practice proper hygiene when handling food to prevent any pathogens from reaching your pet.

How Often Should You Feed Your Hermit Crab?

Feed your hermit crab on a daily basis, but monitor your pet's eating habits and adjust the portion sizes accordingly. Adult hermit crabs typically eat less than younger ones. Remove any uneaten food after 24 hours to prevent mold and bacterial growth. Make sure your hermit crab has access to a constant supply of fresh, dechlorinated water.