The Manila Ocean Park is an oceanarium in Manila, Philippines. It is owned by China Oceanis Philippines Inc., a subsidiary of China Oceanis Inc., a Singaporean-registered firm that has operated four oceanariums in China. It is located behind the Quirino Grandstand at Rizal Park. It opened on March 1, 2008. In terms of floor space, the 8,000 square metres (86,000 sq ft) oceanarium is larger than the Sentosa Underwater World oceanarium in Singapore, and features a 25-metre underwater acrylic tunnel.