In my current game I have a problem with an anti-ship fish sinking my ships. This is a some kind of shark or whale and has a few anti-ship promotions (IIRC 5-6 first strikes and +575% against wooden ships). I am in a late Ancient era and I wonder how to kill this fish. I play with Size Matters but I think even 9 War Galley upgrades (these available with Seafaring, I forgot their name) merged into one unit would fail (this was the case in my previous game). Do you think some bombardment would help? In such case I would need to wait at least for Classical era. S.