Ithaa, which means pearl in Dhivehi, is the world's premier mostly acrylic undersea restaurant, secured five metres below sea level, at the Hilton Maldives Resort & Spa (Soon to be the Conrad Maldives Rangali Island) in Rangalifinolhu, Maldives. The five-by-nine meter restarurant has a capacity of 14 people and is encased in R-Cast acrylic which is a transparent acrylic roof offering 270 degrees panaramic view to its customers. The restaurant was designed and contructed by a New Zealand Company: M. J. Murphy Ltd and was opened on April 15th, 2005.
Ithaa's entrance is a spiral staircase in the thatched pavilion at the end of the jetty. The tsunami which followed the 2004 Indian Ocean Earthquake topped out at 0.3m below the staircase entrance, and caused no damage to the restaurant.
The estimated life span of the restaurant is 20 years.