The Pasig River Ferry Service (PRFS) is a public water bus service based in Metro Manila, the Philippines. It is currently the only water-based transportation service in Metro Manila that cruises the length of the Pasig River and Marikina River, passing through the cities of Manila, Makati, Mandaluyong, Pasig, Marikina, and Taguig.

A water taxi or a water bus is a watercraft used to provide public or private transport, usually, but not always, in an urban environment. Service may be scheduled with multiple stops, operating in a similar manner to a bus, or on demand to many locations, operating in a similar manner to a taxi. A boat service shuttling between two points would normally be described as a ferry rather than a water bus or taxi.