Found on tropical reefs in the Indo-Pacific, the electric file clam has soft tissues which flash light like a disco ball. For years scientists believed the light was generated by chemical reactions known as bioluminescence, but recently scientists worked out the display actually comes from a rapid change from red to white tissue. The white (silica) side reflects 85 to 90 percent of all white light when underwater. Dark and reflective sides are exposed at a rate of 2 times per second, creating th