Thanks to evolution in underwater photography it is possible to see some of the smallest creatures of the sea that are critical to that environment.
Using extension rings and underwater flash, SCUBA diving at night it is possible to capture the polyps of yellow tube coral feeding on plankton.
Star coral observed during the day does not reveal its polyps that wait to feed after sunset.
When you hear or read that the coral reefs are at risk, it may not be evident that these are beautiful creatures that play a tremendously important role.