Mobs: Passive/Peaceful, Neutral, Aggressive/Dangerous
and Planned, Unused, Removed, and Potential Mobs
Mob is short for mobile. They are living, moving animals and/or monsters. Mobs are affected by the environment, like player and are subject to physics. They can be hurt by fire, falling, drowning, or suffocating and they can also even ride mine carts! Mobs are aware of the player within 16 blocks away, except for "Ghast", who can see up to 100 blocks.
Passive/ Peaceful
Passive mobs will never attack the player. All these mobs require land to spawn on, with the exception of Squid. Pigs usually drop 0 to 2 raw pork chop but if you burn it will flint and steel, it will drop 0 to 2cooked pork chops and pigs spawn in grass blocks with a minimum of a 2x2 space above them. Cows spawn in grass and can drop 0 to 2 leather, 1 to 3 raw beef, if you burn it, 1 to 3 cooked beef, and if you right click the cow with a bucket in your hand, it will give you milk. Sheep sometimes drop 1 wool but if you use shears and shear it, it gives you 2 to 4 wool and spawn in grass with a minimum of 2x2x1 space above them. Squids spawn in any depth of water and drop only 0 to 3 ink sacks when you kill them and chickens spawn in grass blocks with a minimum of 2x1x1 space above them (just like sheep) or from a thrown egg (1/8 chance) and drop 0 to 2 feathers, 1 raw chicken, 1 cooked chicken if you burn it and it randomly lays an egg every 5 to 10 minutes while alive.
Pig, Sheep, Cow, Chicken, Squid
Neutral
Neutral mobs will not attack the player unless provoked. The act of provoking Neutral mobs varies between mobs. Endermen drop 0 to 1 ender pearls and whatever else they're holding.
Endermen, Wolf, Zombie Pigman
Aggressive/Dangerous
Aggressive mobs will attack the player when in range. They require a light level of 7 or less to spawn with the exception of Ghasts, Silverfish and Slimes. Cave Spiders and Spiders drop the same things: 0 to 2 pieces of string and 0 to 1 spider eye. Creepers spawn at a light level of 7 or less anywhere buts slabs or grass (so basically everywhere so watch out!) and drop 0 to 2 gunpowder and music discs if a skeleton kills it. Spider Jockeys drop the same as spiders and skeletons combined. Skeletons drop 0 to 2 arrows and 0 to 2 bones when killed. Zombies drop 0 to 2 rotten flesh. Ghast drop 0 to 2 gunpowder. Slime drops 0 to 2 slime balls. Silverfish and wolves drop nothing when killed.
Cave Spider, Creeper, Ghast, Silverfish, Skeleton, Slime, Spider, Spider Jockey, Zombie
Cave Spider, Creeper, Ghast, Silverfish, Skeleton, Slime, Spider, Spider Jockey, Zombie
Planned
Planned mobs are speculated to be added in a future version of Minecraft. Blaze are found in the Nether and can drop from 0 to 1 blaze rods. Ender Dragons spawn in The End and are invulnerable so they won't drop anything. Fish spawn in the water and have unknown health points. Magma Cubes spawn in the Nether and drop nothing. Mooshrooms are half red mushrooms and half cow. They spawn in mushroom boime and drop 2 to 5 red mushrooms if sheared, 0 to 2 leather, 1 to 3 raw beef, 1 to 3 steak if light on fire, and mushroom soup when you right-click it with a bowl. Pigmans are half pig and half man. They are the same shape as a player, Zombies, and Zombie Pigmans. Red Dragons are unknown. Snow Golems spawn at anywhere the player chooses can drop 1 to 15 snowballs. Villagers spawn in villages and don't drop anything. There are a few professions for a villager: butchers, who wears a white apron, farmers, who wear brown robes, librarians, who wear white robes, priests, who wear purple robes, smiths who wear a black apron, and a regular villager, who wears a green robe.
Blaze, Ender Dragons, Fish, Magma Cube, Mooshroom, Pigman, Red Dragon, Snow Golem, Villager
Blaze, Ender Dragons, Fish, Magma Cube, Mooshroom, Pigman, Red Dragon, Snow Golem, Villager
Unused
Unused mobs are mobs found in the source, but are not being used at this time. Through hacking, it is still possible to spawn them.
Giants
Giants
Removed
Removed mobs are mobs that have been removed from the game and can only be found in previous versions.
Beast Boy, Black Steve, Human, Rana, Steve
Beast Boy, Black Steve, Human, Rana, Steve