Story Help?

Something about the clock flipping to a new hour, a new day, has me fiddling with a story in my head. I have images of the ocean, fog, the sound of foghorns the searching light of an old-style lighthouse light (I know the word for the lense I mean, but I can’t recall it this second).

Once, I heard some myth about mixing your blood to the sea and being tied to it thereafter. Or I think I did. If ANYONE knows ANYTHING like this, please point me toward it. The notion is integral to the tale I want to spin.

Thanks in advance.

EDIT: This is loosely related to something I mused about in November, but not really. That story was never written. I need to focus more. Or be accountable to someone.