Singapore Oceanarium

The Singapore Oceanarium is the big new attraction on Sentosa and a genuine upgrade, not a rename. Resorts World Sentosa closed the old S.E.A. Aquarium, expanded it to roughly three times its former size, and reopened it as the Singapore Oceanarium in July 2025, with a new research and learning centre alongside. The visit is now a journey through about twenty zones designed as a voyage through time and through the world's oceans. Highlights start with Singapore's own coast, an immersive mangrove zone that shows the marine life just offshore, and build to the Open Oceans habitat, where reef manta rays, sharks and huge schools of fish move past a viewing panel about 36 meters wide, one of the largest in the world. Ocean Wonders holds thousands of moon jellies in one of the world's largest kreisel tanks, the circular tanks designed for jellyfish, and the Migrators zone follows open-water animals around the continents. The Spirit of Exploration area tells the story of maritime trade with a full-scale replica of a ninth-century Arabian dhow, the kind of ship that carried goods through these waters, and a suspended net walkway lets children climb around it. Allow two to three hours; it is fully indoors, air-conditioned and as good for adults as for children. Tickets are dated, and combination tickets with Universal Studios, next door, or with Gardens by the Bay are available. It is the obvious plan for a rainy afternoon, of which Singapore has many.

The old S.E.A. Aquarium was best known for one giant window; the Oceanarium keeps that drama but adds a story and a mission. The new building is designed to tell how oceans shaped human history and how they are changing now, and conservation is woven through the zones, from the mangroves of Singapore's coast to coral restoration and research. The adjoining research and learning centre houses labs and work spaces for marine scientists, and the content explains their work in a way that holds children's attention.

How to visit well: come early on a weekday or late in the afternoon to avoid school groups and tour buses; weekends and school holidays are busiest. Go through in order, since the zones are designed as a sequence, and pace yourself, because the best spaces (Open Oceans and Ocean Wonders) come in the middle and deserve time. Sit down at the ocean window; the manta rays and the largest fish take a while to pass and the light changes as they do. There is a themed cafe inside and a large shop at the end. Photography without flash is allowed. Strollers are fine, and the entire route is accessible.

Getting there: the Oceanarium is at Resorts World Sentosa, a short walk from the Resorts World station on the Sentosa Express monorail from VivoCity (HarbourFront MRT), or about fifteen minutes on foot via the free Sentosa Boardwalk. It pairs naturally with Universal Studios, but two big ticketed attractions in one day is a lot for small children; a better plan is the Oceanarium in the morning, lunch, then the beaches and the free Sensoryscape walk in the late afternoon, with the island's evening light shows to finish. Ticket prices sit at the upper end for Singapore attractions, and buying online in advance is usually cheaper than at the door.