Spider/Spitter

Spitters are a Cave-dwelling variety of a Spider which can spit web-projectiles as well as bite. They spawn from Spilagmites along with Cave Spiders.

Appearance
Spitters are much like normal Spiders except they have a slightly pentagonal shaped head with hair and bumps all over it as well as four large red eyes.

Hunting
Spitters are unique among Spiders because they have the ability to shoot webbed balls at the player very rapidly. This makes spelunking very dangerous as it is hard to get within melee range; thus, it is recommended to use a ranged weapon when facing Spitters. The projectiles can be dodged, but they are very fast and have a small splash radius. The best way to dodge their spit is to run orthogonally, though they will still sometimes hit you. Also, they can´t be stun-locked, which makes them very dangerous if you are trying to kill one without armor or more than one.

Trivia

 * Spitters are the fourth Mob capable of a ranged attack because they have the ability to spit.