In the submarine editor, the spawnpoints can be set to enemy and the icon of the spawnpoint turns into what looks like a sea monster. What is this supposed to do? My guess is its a unfinished way to spawn in monsters with your submarine. My follow up question is, how can you put creatures to spawn with your ship? I want to make a ship that has a certain creature spawn in it by default.

I think they still have to be spawned in with commands, it just designates a spawnpoint.