How to always win Roblox Sharkbite Classic

This is just about the most overpowered strategy I have ever found in Roblox Sharkbite Classic. I have never seen it fail yet!

Some things to consider:
- The submarine requires 2000 sharkteeth.
- This may upset other players (especially if used repeatedly in the same server).
- This is a hiding strategy, so as more and more people know about it, it may likely become less effective.
- It likely doesn't work in Roblox Sharkbite 2 (at least since the last time I played)