The goatfishes are fish in the Mullidae family . They have a pair of chin barbels, which contain chemosensory organs that are used to probe the sand or holes in the reef for food. They are distributed worldwide in tropical, subtropical and temperate waters. They have the ability to change color, and many species adopt a pale coloration to become less visible to predators. They are pelagic spawners and release many eggs into the water which float freely until hatching.