Cardinal fish (Apogon sp) moments after it has mistakenly tried to eat an ostracod. The ostracod then releases glowing mucus that is so bright that it can be seen through the body of the fish. This gives the fish a huge shock, and it spits the ostracod out, which continues to draw attention to the fish by swimming in tight circles ejecting more glowing material. The ostracod can be seen at the bottom of the picture making its escape. This all makes the fish extremely visible to any predators on the reef.