Put it on peaceful
You can download mobs minecraft comes alive
37
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.
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
The squid
Ghasts are one of the biggest mobs in minecraft. They look like giant jellyfish.
Grass and stone blocks.
The Guardian
No, the AI for mobs in minecraft has been improved so mobs don't spawn in strange places. You can manually spawn them in lava with that mob's egg.