That’s a tough one. The gorilla is big and easy to spot, but if he ever gets angry at you, you’re guaranteed dead. The snakes are harder to spot and numerous, but would be more predictable in their aggression as long as you don’t accidentally startle them.

I think I would have to go with snakes. It’s much easier to snake proof a roof than it is to gorilla proof a room. As long as there are no holes, snakes will never get in. You would need a full on barricade to stop an angry gorilla. Plus depending on the stores available, you could probably kill the snakes with little risk using traps or poison.