Siren

Sirens are similar to mermaids, however they are much more dangerous. Sirens can also be depicted as part-woman and part-bird. When they sense a ship or crew coming, they sing a song so soothing that it makes the sailors do whatever the song says, which is usually wreck their ship. To avoid the "Siren's Song", you can plug your ears with cotton or other material, so you cannot hear anything. If the captain is brave enough, he will have his crewmates tie him to a mast, and he will endure the song until it is over.