This outstanding documentary chronicles the effects of global warming on our oceans and its consequences on the bleaching/death of coral reefs worldwide. Documentary explains the process and scientists efforts to document the effects of the rising ocean temperatures due to increased greenhouse gas emissions. If you teach environmental science or oceanography, this documentary is an excellent, easy to understand resource suitable for middle or high school students. Download contains twenty questions that follow the film and some suggestions for follow up activities for students including the opportunity to take a virtual reef dive.