Lake Tanganyika, the longest lake in the world (660km), is one of the best kept secrets and one of the most beautiful places to visit in Tanzania. This incredible rift lake is home to biological diversity hotspot with over 2,000 species of plants, fish, birds and invertebrates that are only found in this part of the world. But the one animal that steals the show is the cichlids (home aquarium fish). There are over 250 types of cichlids, each more colorful and more beautiful than the next. Most species of cichlids are specialized feeders so many different types can live together without too much competition, allowing visitors to see all kinds of cichlids on their visit. The best way to see these colorful creatures is, of course, through a scuba diving adventure.