Which mythical creature is half-woman and half-fish?

Mermaid

Which popular drink comes from roasted cocoa beans? Which Central American civilization created the Popol Vuh, their sacred text? In what battle did the famous phrase 'Don't fire until you see the whites of their eyes' originate? Who was the U.S. general who accepted the British surrender at Yorktown in 1781? Which rain forest covers the largest area on Earth?