Amphibious Architecture is a floating installation in New York waterways that glows and blinks to provide an interface between life above water and life below. It was developed by the Living Architecture Lab at Columbia University Graduate School of Architecture, Planning and Preservation and the Environmental Health Clinic at New York University, and it was commissioned for Toward the Sentient City by the Architectural League of New York.

Two networks of floating interactive tubes, installed at sites in the East River and the Bronx River, house a range of sensors below water and an array of lights above water. The sensors monitor water quality, presence of fish, and human interest in the river ecosystem. The lights respond to the sensors and create feedback loops between humans, fish, and their shared environment. An SMS interface allows citizens to text-message the fish, to receive real-time information about the river, and to contribute to a display of collective interest in the environment.