Last weekend we went to Mafia Island, a very underdeveloped island off the coast of Dar. It was absolutely beautiful. We stayed at a place that had NO electricity, NO running water and the accomodations were open air tree houses. It was amazing. Mafia is known for its whale sharks, which is not only the biggest shark, but also the biggest fish (great piece of trivia!). They are like whales in that they don't eat people, just plankton and little fish. Unfortunately, we didn't see one, but we had an amazing day snorkeling.