Underwater World Singapore and Dolphin Lagoon

Underwater World, also known as Underwater World Singapore Pte Ltd, was an oceanarium located on the offshore Singaporean island of Sentosa. Opened in 1991, it had more than 2,500 marine animals of 250 species from different regions of the world. The oceanarium was mostly underground and it was owned by the Haw Par Corporation. The Underwater World's ticket included admission to the Dolphin Lagoon at Palawan Beach.

Underwater World was also involved in several environmental and educational projects, such as the Living in the Ocean Programme, Ocean Ambassador Programme and the Coral Club.