The Mob Spawn Controls Mod for Minecraft, developed by "Davidee", introduces a new variety of options that allows the player to completely reset the way that mobs spawn. This mod - accessible by simply keying 'F6' - has separate controls for each type of mob in the Minecraft universe; creatures, monsters and water types.
Using this mod the player can dictate how frequently each mob spawns (or discontinues spawning for a particular mob all together) and what biomes the mobs spawn in.
This mod makes it for a player to destroy any mob’s existence. If the player wishes, they could live in a universe with only one type of mob around.
This mod is a fun way to dictate the settings in the player’s universe (mob wise, of course) and make their Minecraft universe custom to their wishes.