Do hermit crabs need a towel over their cage?

No, hermit crabs do not need a towel over their cage. In fact, it can be harmful to them, as it can prevent them from getting enough air. Hermit crabs need to be able to breathe, and a towel can block the airflow. Additionally, a towel can make it difficult for them to climb, and they may become stressed trying to get out from underneath it.

However, it is important to provide hermit crabs with a dark place to hide. They are nocturnal animals, and they need to be able to retreat to a dark place during the day. You can provide a hiding place by placing a piece of driftwood or a piece of PVC pipe in the cage.