The Fathomking's Answer

 is where you progress the middle section of your father's bones quest.

Trigger Events
The Fathomking's Answer is accessible when bones and stuff. Also, from the Throne-Cyst.

Description
"His Complexity is watching you. His eyes are cold as polished stones, but a smile lurks at the corner of his mouth, like an eel in ambush."

Interactions
NOTE: Checking your inventory AT ANY TIME will kick you back to port, and you'll have to spend another Zee-ztory to get back down. Super annoying, but there we are.