John Lyons has been interested in fishes as long as he can remember, avidly fishing, snorkeling/diving, and keeping tropical and temperate fishes from an early age up to the present. He became fascinated with the scientific study of fishes as an undergraduate student at Union College in Schenectady, NY, from which he received a B.S. in Biology in 1979, leading him to choose to make fish biology his career. He attended graduate school at the University of Wisconsin-Madison, receiving his M.S. in 1981 and his PhD in 1984, both in Zoology with emphasis on fish ecology and ichthyology. In early 1985, just after completing graduate school, John was fortunate to be hired as a Fisheries Research Scientist for the Wisconsin Department of Natural Resources and to be appointed as Adjunct Curator of Fishes at the University of Wisconsin Zoological Museum, both in Madison, positions he has held ever since. His Research Scientist job focuses on supporting the management of the Wisconsin fish fauna, whereas much of his Curator position is concerned with the biology and conservation of Mexican freshwater fishes, particularly the goodeids. He made his first scientific expedition to Mexico in 1986 and has returned almost annually ever since, forging professional collaborations with Mexican institutions in Guadalajara, Morelia, Mexico City, and Queretaro, where he was a visiting professor in 1999. Currently John is working with Mexican biologists on systematic analyses and descriptions of possible new species of cyprinids, atherinopsids, and cichlids; delineation and management of biological reserves to protect rare fishes and overall aquatic biodiversity; broad-scale and long-term assessments of the health of Mexican lakes and rivers based on their fish communities; and a field guide to the freshwater fishes of the Mexican states of Jalisco and Colima. He was named an honorary member of the Mexican Ichthyological Society in 2010. As a hobbyist, John focuses on cyprinids, centrarchids, and percids from Wisconsin and goodeids and poeciliids from Mexico, but admits to be being a better field biologist than aquarist (“I can catch them a lot easier than I can keep them”).