That's what they do. They have those submarines, you didn't see them? They're incredible, with all those glowing lights!

[Just putting him on this topic has made his whole face brighten up a little with interest. Those submarines were so cool and riding in one immediately became a personal goal to achieve some day.]

They must need them to avoid the fighting fish, or fighting fish spirits, I guess, in the lake. Speed and metal hulls to keep them safe.