Pseudo-atoll Pseudo-atoll A pseudo-atoll, like an atoll, is an island that encircles a lagoon, either partially or completely. A pseudo-atoll differs from an atoll as established by several authorities, such as how it is formed (not by subsidence, nor by coral). It is considered a preferable term to "near-atoll". There is a need for rigorous definition of "pseudo-atoll" before it can be accepted as a general term. Alexander Agassiz gave the term pseudo-atoll to "any ring-shaped reefs not formed as a result of subsidence". while Norman D. Newell and J. Keith Rigby called such reefs non-coral. and "We conclude that almost-atoll
Alif Dhaal Atoll found in Ariadhoo Island. Whale sharks are year-round residents of Alif Dhaal Atoll. The South Ari Atoll administrative division consists of the southern part of the geographic or natural Ari Atoll (described as Southern Ari Atoll in this context to differentiate from the official name of the administrative division). The atoll consists of Inhabited Islands and Uninhabited Island, a definition which includes resort islands, airport islands and industrial islands. Resort islands are classified as Uninhabited Islands which have been converted to become resorts. The following are the resort islands, with the official name of the resort. Alif Dhaal Atoll Alifu