Cave spiders can be dangerous enemies, they are small: smaller than a half slab, and apply the Poison effect. This makes them hard to farm. However, with some skills and care, it is possible.
- See also: Tutorials/Monster Spawner traps
The spawning area is generally the same as for other monster spawner-based traps, however remember that cave spiders are smaller.
A manual cave spider grinder.
Another cave spider farm.
Because of their size, ability to hold breath underwater, and ability to climb walls, lava, water and gravity grinders are ineffective or not as effective on them.
Manual grinders require a hole that is too narrow for cave spiders while allowing players to attack them easily. One way of making one is a fence next to a closed door: