The Sea Cannon is a defensive building found in some missions. It is like the Cannon Tower, except floating.
Like their land-based counterparts, Sea Cannons do not deal much damage and are easy to destroy, with the added bonus of always being able to ram them.
Their elite variant is the Blaster Tower.
| Fortress Destroyer Enemies
Enemies listed in parentheses () following another enemy are the elite form of that enemy. If there is no elite form listed, that means one does not exist or has not yet been added to the game.