Endermite

Endermites are small Hostile Mobs similar to Silverfish found in The End. They are spawned by Watchers and can also spawn when a Watcher dies. They are also sometimes spawned by breaking Endstone with anything other than a Stonk. Usually for early-game to mid-game players, this mob can be extremely annoying, and even to players with mid-game Dragon Armor or Ender Armor.

This mob deals 400 damage at level 37 and 475 damage at level 40.

Health
They spawn with (from Endstone) and  (from Watchers). Their hitboxes are very small, which makes it harder for the player to damage them.

Strategy
If you are early-game, deal with them using your Bows or don't engage at all. Their slow movement speed makes them easier to run away from.

is a good enchant for dealing with this mob.

Trivia

 * If a Watcher accidentally shoots an Endermite, it will turn hostile towards that Watcher.
 * The Endermite is the smallest mob in 1.8, and thus in Skyblock.