Marik said:In my opinion the tentacles comes from a different creatures, besides the ghosts, but of course I'm not sure.
The boss says the creatures are their new "brothers", so I'm inclined to think they are related to the ghost ship in a way or another.
Oburi said:I think we threw around the term Ghost ship too much and that threw me off.
The title of the previous episode was "ghost ship". In the preview (of this episode) the pirate captain is explicitly saying it's a ghost ship. And we can see a supernatural glow in one of the ship's portholes, like a ghostly eye (was the same in episode 308). What more do you want?
Additionally, the boss says that pirates and monsters get along well, that they see eye to eye.