A Shadowy Predator

 is a Sunless Sea Explore Random Event.

Trigger conditions
 can be triggered in Demeaux Island and in  Port Cecil by doing the following:

Event description
It's the little things. The click of a sliding stone where there should be silence - a motion in the shadows, as if they were thick-stirred like ink - a lull in the cries of the zee-bats. Something is watching you, drawing closer hour by hour. You and your crew draw back to back, watching the darkness.