Mouse

The Mouse is a critter and cannot harm players. However, unlike most critters, they cannot be harmed by monsters. Mice have only 5 health. They spawn in the Underground and Cavern layers. Their small size and speed can make them difficult to spot even in well-lit conditions, although they occasionally squeak. Unlike most other critters, NPCs will prevent mice from spawning.

A Gold Mouse may also spawn instead. Mice can be captured with a Bug Net.