Three clownfish swim above their anemone in Queensland, Australia. The largest fish is the female and the other two are males. Clownfish are actually not immune to the sting of an anemone, but they are covered in a special slime that prevents stings.
This is a horizontally orientated photo. The first number in the size listing will be the height, and the second number is the width. For example, a 20x30 will be 20" tall and 30" wide.