If you mean in all mods ever, then potentially thousands. Mods are add-ons to minecraft created by users, and new ones are made every day. To count how many modded mobs there are in Minecraft would be near impossible
Modded Cops and Robbers is another Mind Craft game where players can morph into any player and creature while the prison is filled with mobs. Players fight against mobs while trying to escape the prison.
Modding in the minecraft means same as the name. Installing the mod make new things, like new monster (mobs), new biome and stuff like that. It makes minecraft more fun. So modding means minecraft modded.
Not including potions, there are 300 items and blocks if it isn't modded.
No.
You can download mobs minecraft comes alive
In Minecraft Classic, mobs can't spawn, so they can't exist naturally. If you play the Survival Test, and when mobs spawn there, you can save it and open it in creative mode so then the mobs can stay there. However, in Minecraft Creative Mode, mobs can spawn, but they can't hurt you because you have no healthbar.
Put it on peaceful
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Mobs are enemies, so I suppose that there wouldn't have been.
No, mobs will not spawn in water or ontop of half slabs.
Creepers can not have kids in vanilla Minecraft. No hostile mobs in Minecraft can be bred.
You kill mobs and players