Splitfin flashlightfish or two-fin flashlightfish, Anomalops katoptron. They have two bean shaped torch-like organs under its eyes containing bioluminescent bacteria, which the fish can turn on and off by blinking. The light organs are embedded in suborbital cavities and are connected at the anterior edge via a cartilaginous rod like attachment. The suborbital light organs are densely settled with luminous symbiotic bacteria that grow in tubular structures and produce a constant bluish light. The flashlight fish blinks up to 90 blinks per minute, but when the flashlight fish detects its living planktonic prey, their light organs open for a longer period of time and blink five times less frequently. Philippines - Composite image