The Penghu Aquarium (traditional Chinese: 澎湖水族館; simplified Chinese: 澎湖水族馆; pinyin: Pēnghú Shuǐzúguǎn) is a public aquarium in Baisha Township, Penghu County, Taiwan.

The aquarium was established in 1997 to enable the Fisheries Research Institute to study local marine ecology.

The aquarium covers 2 hectares of land. The main building is surrounded by gardens and sculptures of various types of marine creatures. The building is a two-story building with three main sections, consisting of a seashore exhibition area, a reef exhibition area and an ocean exhibition area. There is also an underwater tunnel with a walkway encased in glass. The main architect for this building, Barney Thorne, engineered the huge fish tank inside which houses a large variety of exotic fish.

The aquarium is home to over two hundred species of fish, taken from water within a 800 km radius of Baisha, covering the Taiwan Strait and South China Sea.

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