ballena naonal park. these corals look the way they're supposed to.e marine biologist is satisfied. >> what a beautiful place. the reef is in very good shape, really, really nice. the corals look really good, the surface is perfect and there are a lot of fish. >> one of the reasons is that there are very strict rules in the national park. snorkeling and looking is allowed. touching is strictly forbidden. schlÖnvoigt points to the marino ballena national park as a good example. here, authorities were able to get local residents on board years ago, but only after dealing with angry protests. the fishermen were worried about their livelihoods. >> a guard station was burned down in 1994. we don't know who did it. maybe it was because of a conflict of interest. but today, the fishermen from the 1990's work as tour guides. >> there are only a few fishing boats now, out along the edge of the national park. most of the fishermen have retrained as tour guides and their new careers have changed the way they think. >> it used to be that the national park meant t