a sunken slave ship and he noticed other mysteries. >> there are a lot less fish and a lot less coral so he added an ecosystem monitoring program to the group's mission. they call it diving it with a purpose. >> corals can't move so they are directly affected by the changes and the rise of sea level. we're dumping 7 million tons of plastics in our oceans so we're killing the porls. >> dwp cares is now his life's work. they are combining a sport that i love, scuba diving and they were conshen crouse of the environment. more importantly they have incorporated the next generation. >> 18-year-old ohio state