
This small island is actually where diving first started seriously on Bali back in about 1978 under the sponsorship of the Indonesian Navy, when it arranged a get-together of the country’s main diving clubs -Possi, Ganesha, Nusantara, and Trisakti. That get-together led to Menjangan establishing itself as the premier international dive location in Bali and many of the attendees went on to become the pioneers of commercial dive operations across Indonesia.
The island is also known as the location for the best wall diving in Bali, with a very bright & colorful underwater world and lots of different sites to choose from. These dive sites are rich in marine life and sandy beaches to relax over lunch.
At a depth of 45 meters the Anchor wreck is found. Also called the Anker or Kapal Budak (Slave Ship), the site is an old wooden ship wreck sitting on the sea floor on the western tip of Menjangan which is either an 19th century Dutch ship that sunk during WWII or one that sunk much earlier during the Dutch colonial era while supposedly carrying Balinese slaves to Batavia (now Jakarta).The wreck contains a cargo of ceramics and glass bottles and is completely colonized by soft coral; an excellent place to meet turtles and shark.
And there is a big surprise for macro-photographers, video-operators and marine biologists at the Secret Bay”. In the small bay near the ferry port of Gilimanuk, a strange play in currents has rendered the water temperature here to be more, at most 25 degree C, which has created a habitat for Pacific and Indian Ocean species, with often hybrids between the two. The muddy shallow beds, mixed with algae and debris, are host to truly strange marine creatures, some of which have recently been discovered by marine biologists for the first time, such as the 4 types of anglerfish including the Sargassum Anglerfish, Spotfin Anglerfish and one in particular that has created great interest among biologists, locally called the Tono’s Anglerfish. Apart from the anglerfish, the bay is host to numerous different sea horses, dragonets, ghostpipefish, nudibranches, lionfish such us the Blue Finned lionfish, ribbon eels and much more. This unique bay has been and still is the preferred location of some of the world’s most famous underwater photographers and filmmakers, as well as researchers and marine biologists.
(source: Wonderful Indonesia)