Siren at work
The Sirens are beautiful sing-song creatures out to sea, which catch sailors' attention so they would go off-course. They can sometimes use their tidal wave powers or any other powers they can to destroy or sink ships.  


The Sirens can be two-faced, cheating creatures that tend to charm gullible men, mortal or immortal. Odysseus nearly fell for it too. 


They are described to be as beautiful as mermaids, but they are hiding their true form inside, they are vicious vulture-like creatures that resemble the Harpies.