In other cultures, mermaids are less benevolent. They linger on rocks at sea, tempting sailors to wreck their ships with their soft songs or distracting men and causing them to fall overboard. A mermaid can cause floods, high tides and other disasters if she is angered. Mermaids may drown sailors who fall in love with them by pulling them beneath the water. Mermaids don't realize that humans can't breathe undewater.