Sharks are extremely crucial to the marine ecosystem. Overfishing has driven many shark species to the brink of extinction. The Project AWARE Shark Conservation Diver Distinctive Specialty Course teaches students the significance of sharks in our marine ecosystem as well as the events that led to the global decline of shark populations. I love this course, especially because non-divers can engage in the program as well and receive an AWARE Shark Participation certificate... http://oceanslug.com/2014/10/22/shark-aware/#more-636