What does a hermit crab eat besides food?

Hermit crabs are omnivores, meaning they eat both plants and animals. They don't eat things besides food, but they do have some interesting dietary needs. Here are a few things they need for a healthy diet:

* Calcium: They need calcium to build and maintain their shells, which they steal from other sea creatures. This is why you often see them with shells that don't match their own species.

* Protein: Hermit crabs need protein to grow and develop. They get this from eating fish, crustaceans, and other small invertebrates.

* Algae: Some hermit crabs will also eat algae, which provides them with essential vitamins and minerals.

* Fruit: Hermit crabs can be offered fruits like bananas and apples as a treat.

* Vegetables: Greens such as spinach and lettuce are a good source of vitamins and minerals for hermit crabs.

It's important to provide hermit crabs with a varied diet to ensure they get all the nutrients they need.