Golden algae, which can present an environmental threat to lakes and rivers, has recently been detected in some Arizona lakes. The presence of golden algae’s blooms, which are often toxic, has been confirmed in the state’s popular Canyon Lake and Saguaro Lake, where increasing fish deaths are being reported. Tayor Weiss, an assistant professor of environmental and resource management in The Polytechnic School, part of the Fulton Schools, says it could be only a matter of time before people and pets are threatened. Weiss and others warn the infestations can spread widely, especially where lakes and rivers are connected.