The S.E.A. Aquarium (South East Asia Aquarium) was the world’s largest aquarium by total water volume until overtaken by Chimelong Ocean Kingdom in Hengqin, China. It contains a total of 45,000,000 litres (9,900,000 imp gal; 12,000,000 US gal) of water for more than 100,000 marine animals of over 800 species. The aquarium comprises 10 zones with 49 habitats. The centerpiece of the aquarium is the Open Ocean tank with more than 18,000,000 l (4,000,000 imp gal; 4,800,000 US gal) and 50,000 animals. (Source from Wikipedia)