The rules are simple and few: watch the beach, and if you see anything untoward, ring the bell.
Well, it's not technically on the beach, so-
No, it's not coming towards the beach, either, but-
I'm just not sure this is the kind of emergency the bell is for?
...
Okay, I'll ring it, but I'm not sure what the monster hunters are supposed to do if the ocean itself just got up and left.