You were a basic merperson (you choose species) of the sea, slowly swimming through some shadier parts of a reef you knew when you felt like you were being hunted. You constantly looked about but failed to see anyone, and continued to swim along with unease...But there were eyes up on you, ones of a predatory Mershark that killed for fun. You caught his eye, and now he felt the urge to toy with you...And as you stop for a break you feel a presence behind you

"Well hello there pretty fishy~"