last habitat left in africa for dugongs, this is the last viable population of dugongs that we have along this coastline. and for manta rays this was an incredible place, in all my travels around the world i have never encountered a location where both species of manta rays live. so this makes it such a critical habitat for manta rays, and this is one of the reasons why i have dedicated my life to doing research in southern mozambique. >> the marine biologist and her team have been doing research in the bazaruto archipelago for 13 years. these nutrient-rich waters are a favorite breeding ground for several large fish and marine mammal species. even though it's a protected area, fish stocks have been dwindling. tomas manasse was born on the main island. he supervises 23 rangers for the national park. he says they need to be more to cover the many jobs rangers have to do. they go on patrols, collect data and provide information. comunities want to know why farming has to be limited on the islands and fishing, as well. manasse and his brothers are the first in their family who don't ma