Dal Shabet

After examining the statue and bow, Jervais moved on. This time he found himself near the underwater lair of the Sea Devil.
Is this not some kind of underwater thing? Otherwise, I don't know how to swim. If it is, then I will go somewhere else.

Legends describe the Sea Devil as a huge creature living underwater and possessing divine power. According to historical notes and eyewitness accounts, it appears once every 250 years, destroys some coastal city, and then returns to the depths of the sea. There are not many followers of the Sea Devil among sailors, let alone ordinary people, but pirates hold him in high regard. They consider him the ruler of the underwater world. Since Jervais cannot swim, he had no way to swim into the underground cave and learn more.