Not too different from their last visit to Qliphoth, Guts and Schierke stood before the gates of hell once again. The Sea God was actually a Malboro who has so many aggressive split ends and Guts aims to skip fighting the lot of them by jumping straight for the mouth.
Maybe the Sea God's death will also make Thickskull Bonebeard the Pirate fade away into seaweed because the monster's magic is the only thing that keeps them on going.