New Game Design/Gameplay needed for dealing with Enemies in future games

[Cranky Old Man]

I'd like an enemy that you can't HEAR. The hammerhead shark would have been a great chance to make such an enemy, or any kind of marine life. You have to spot it to be able to avoid it. Sure: The angler fish is such an enemy, but you can spot it a mile away. The reason why people feared the creeper in Minecraft, was because you could barely hear it.