Crystal River is a river that flows through central and south Wuhu Island. It originates from inside the heart of Maka Wuhu and flows south into the Wuhu Sea. It gets its name from the clear water from Summerstone Falls that cascades into the river. Red Iron Bridge runs through the brackish Crystal River Delta and connects Wuhu Town to east Wuhu Island.

There are a small handful of species that live in Crystal River including the Armored Catfish, Silver Arowana, and Fiddler Crab. The river delta is an important breeding ground for Fiddler Crabs, and the south part of the river is a breeding ground for the Armored Catfish, or Plecostomus.