Mobs are living and moving game entities. The name for them is short from mobile and was carried over from the genre of old MUD games.
Spawning
Mobs spawn in various ways, depending on the light level and other criteria. Many types of mobs often spawn in groups of the same species. Mobs cannot spawn on non-opaque blocks or in water (except for aquatic mobs), in lava or on half blocks like slabs. Exceptions are mob spawners.
Mobs can also be spawned via spawn eggs in creative mode or via the /summon command.
Behavior
Mobs have general behavior properties akin to players, as they are subject to physics and can be hurt by many damage sources that would hurt a player. Some mobs have immunity, however.
Mobs
Passive
Neutral
Hostile
Aechor Plant 
Battle Sentry 
Cockatrice 
Mimic 
Sentry Golem
Sentry 
Tempest 
Tracking Golem 
Zephyr
Bosses
Labyrinth Eye 
Sentry Guardian 
Slider Host Mimic 
Slider
Unused
Removed
Aerwhale 
Flying Cow 
Phyg 
Sheepuff
| ||||||||||||||||||||
| |||||||||||||||||||||||
