The Singapore Oceanarium, formerly S.E.A. Aquarium, is an oceanarium as one of the two primary attractions of the Marine Life Park, which is a part of Resorts World Sentosa, located on Sentosa, situated in southern Singapore.
At the time of its opening on 22 November 2012, the S.E.A. Aquarium was the world's largest, by total water volume, containing nearly of water, and housing more than 100,000 individual marine, brackish, and freshwater animals belonging to over 800 species.
The aquarium was divided into 10 zones with 49 habitat exhibits. The centrepiece of the aquarium is the Open Ocean exhibit, which features more than and 50,000 schooling fish, as well as rays, sharks, and other marine creatures.
The S.E.A. Aquarium had the world's largest underwater viewing panel, at wide, tall and thick, built to give visitors the feeling of being on the ocean floor until the aforementioned opening of Chimelong Ocean Kingdom in Hengqin, China in 2014. There is also a conservation group called Guardians of the S.E.A.A., which supports research, education and public engagement efforts to protect the marine environment.
S.E.A. Aquarium ceased operations on 30 April 2025 for rebranding and expansion works, and reopened as Singapore Oceanarium on 24 July 2025. The expanded oceanarium is divided into 22 zones which showcases diverse marine life, each telling a story about the oceanâÂÂs past, present and future.
The main attractions include: