Spider

The Spider is a non-hostile critter found in all Caves and Deep Caves. It is one of the small ambient creatures that populate underground areas rather than an enemy mob, and it has 10 health.

Because it is non-hostile, the Spider does not actively threaten the player. Its presence is mainly a sign of cave terrain and underground wildlife. As with other critters, it can be encountered while exploring cave systems and deeper underground layers, where it adds life to the environment without changing combat difficulty.