Cave Spider

Cave spiders are neutral mobs that can inflict poisoning.

Monster spawners
Cave spiders spawn from monster spawners in abandoned mineshafts.

Drops
They drop 0–2 string. They also have a $1/3$ chance to drop a spider eye if killed by a player. They drop 5 experience when killed by a player or tamed wolf.

Behavior
Cave spiders inherit most of their behavior from regular spiders:
 * Pacified (made neutral) by bright light (daylight or light levels of 9 or higher) but will continue attacking regardless of light change once hostile. Subjecting them to darkness will render them hostile.
 * Climb walls when needed.
 * Attack by leaping at their targeted entity.
 * Unaffected by cobwebs or poison.
 * Can fit through a space that is 1 block wide and half a block tall.
 * Can go through the spaces between Nether Brick and Normal Fences.
 * Run much faster than spiders.
 * Can spawn spider jockeys in the bedrock edition.

Unlike regular spiders, they do not spawn with status effects.

Venom
When attacked by a cave spider on normal or hard difficulty, the bitten entity is inflicted with I. On normal difficulty, the poison lasts for 7 seconds and can cause up to  damage. On hard difficulty, it lasts for 15 seconds and can cause up to damage. Note that even on hard, poison damage is not taken when health is at.

Data values
Cave spiders have entity data associated with them that contain various properties of the mob. Their entity ID is.

Trivia

 * While a cave spider's hitbox is only 13.9% the volume of a normal spider's, its model's volume is 34.3% as large. The shadow is even larger: compared to the normal spider's shadow it has an area of 49%.