The ten largest public aquariums in the world by total water volume, from China's record-holding Chimelong Spaceship to Aqua Planet Jeju in South Korea.
Chimelong Spaceship, at 75,350,969 litres certified by Guinness World Records, is the largest aquarium in the world. Chimelong Ocean Kingdom in China is second at 48.75 million litres and Singapore Oceanarium third at 45.2 million litres. The ranking uses total water capacity of all tanks and pools, from Wikipedia's List of largest aquariums, read 18 October 2026.
Public aquariums have grown from rows of fish tanks into indoor oceans holding tens of millions of litres. The largest now hold whale sharks, manta rays and orcas, and four aquariums have held the size record since 2005: Georgia Aquarium, S.E.A. Aquarium, Chimelong Ocean Kingdom and, since 2023, Chimelong Spaceship. This list ranks the ten largest public aquariums by total water capacity in litres, using the figures in Wikipedia's List of largest aquariums (read 18 October 2026). Only the No. 1 figure is a Guinness World Records measurement; the rest are operator or press figures collected on that page.
In Hengqin, China, Chimelong Spaceship holds the Guinness World Records titles for the largest aquarium, at 75,350,969 litres in total, and the largest aquarium tank, at 56.45 million litres. It opened in 2023 at the Chimelong International Ocean Tourist Resort.
Chimelong Ocean Kingdom, the same resort's first park, holds 48.75 million litres and was the Guinness record holder for largest aquarium from 2014 until 2023. It also holds the Guinness record for the largest underwater viewing dome, and its largest tank holds 22.7 million litres.
On Sentosa, Singapore, S.E.A. Aquarium opened in 2012 with about 45.2 million litres and held the largest-aquarium record until 2014. Its Open Ocean tank holds about 18 million litres. It closed in April 2025 and reopened, expanded, as Singapore Oceanarium in July 2025; the total here is the pre-expansion figure.
Georgia Aquarium in Atlanta holds 11 million US gallons (about 41.64 million litres) and held the largest-aquarium record from 2005 until 2012. Its largest tank, Ocean Voyager, holds 6.3 million gallons (about 23.85 million litres) and houses whale sharks and manta rays.
L'Oceanogràfic in Valencia's City of Arts and Sciences holds 41.6 million litres, just 40,000 litres less than Georgia Aquarium, making it the largest aquarium in Europe on this list. Its largest tank holds 7 million litres.
The Port of Nagoya Public Aquarium holds 27 million litres across its North and South buildings. Its largest tank, at 13.4 million litres, is the orca and dolphin performance pool, built in 2001.
The Moscow Oceanarium (Moskvarium) at VDNKh has a total capacity of 25 million litres, most of it in its performance pool, dolphin and orca enclosures and swimming pools; its aquarium exhibits account for about 3 million litres, and its largest single display tank holds about 1.49 million litres.
Taiwan's National Museum of Marine Biology and Aquarium in Hengchun holds 24.14 million litres, with a largest tank of 4.07 million litres. It opened in February 2000 and has three main exhibition areas: Waters of Taiwan, the Coral Kingdom Pavilion and the World Waters Pavilion.
The Seas with Nemo & Friends at Epcot holds 5.7 million US gallons (about 21.58 million litres). It opened as The Living Seas in 1986, when its tank was the largest saltwater tank in the world, and was re-themed to Finding Nemo in 2006–2007.
Hanwha Aqua Planet Jeju, opened in 2012, holds 20 million litres and is the largest public aquarium in South Korea, with about 48,000 animals of some 500 species. Reported sizes for its main tank, the Sea of Jeju, differ between sources (5.3 million and 10.8 million litres).
| # | Name | Location | Largest tank | Record | Opened |
|---|---|---|---|---|---|
| 1 | Chimelong Spaceship | Hengqin, China | 56.45 million litres | Largest aquarium (Guinness, since 2023) | 2023 |
| 2 | Chimelong Ocean Kingdom | Hengqin, China | 22.7 million litres | Largest aquarium 2014–2023 | 2014 |
| 3 | Singapore Oceanarium (formerly S.E.A. Aquarium) | Sentosa, Singapore | 18.17 million litres | Largest aquarium 2012–2014 | 2012 (reopened 2025) |
| 4 | Georgia Aquarium | Atlanta, USA | 23.85 million litres | Largest aquarium 2005–2012 | 2005 |
| 5 | L'Oceanogràfic | Valencia, Spain | 7 million litres | Largest in Europe (this list) | 2003 |
| 6 | Port of Nagoya Public Aquarium | Nagoya, Japan | 13.4 million litres | — | 1992 |
| 7 | Moscow Oceanarium | Moscow, Russia | 1.49 million litres | — | 2015 |
| 8 | National Museum of Marine Biology and Aquarium | Hengchun, Taiwan | 4.07 million litres | — | 2000 |
| 9 | The Seas with Nemo & Friends | Bay Lake, Florida, USA | Not listed | Largest saltwater tank 1986–2005 | 1986 (as The Living Seas) |
| 10 | Aqua Planet Jeju | Jeju Island, South Korea | 10.8 million litres (disputed) | Largest in South Korea | 2012 |
Aquariums are ranked by total water capacity in litres as listed in Wikipedia's List of largest aquariums, read on 18 October 2026, which includes aquariums with more than 10 million litres in total or a tank larger than 5 million litres. Figures given there in US gallons are converted at 3.785 litres per gallon. Total capacity means all tanks and pools on site, so oceanariums with show pools (such as Moscow) count those pools. Figures come from different publishers and years: Chimelong Spaceship's is certified by Guinness World Records; most others are operator or press figures and have not been independently measured. Singapore's entry uses the 45.2 million litres published for S.E.A. Aquarium; it reopened as the expanded Singapore Oceanarium in July 2025 and no updated total is listed. No ties occur in the top ten.
Total water volume is the combined capacity of every tank and pool at the site, in litres or US gallons. Operators publish their own totals; only the current record holder, Chimelong Spaceship, has a total certified by Guinness World Records. The largest single tank is a separate measure.
Chimelong Spaceship (75.35 million litres) and Chimelong Ocean Kingdom (48.75 million litres) are both parks of the Chimelong International Ocean Tourist Resort in Hengqin, Zhuhai, China. Ocean Kingdom held the largest-aquarium record from 2014 until Spaceship took it in 2023.
Chimelong Spaceship, whose main tank holds 56.45 million litres (a Guinness record). Next on this list are Georgia Aquarium's Ocean Voyager at about 23.85 million litres and Chimelong Ocean Kingdom's largest tank at 22.7 million litres.
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