Tom Niesen received his Ph.D. in biology from the University of Oregon in 1973, specializing in the ecology of marine invertebrates. He has taught at San Francisco State University since 1973, where he is currently Professor of Marine Biology. In addition to a career-long fascination with the ecology of the rocky intertidal zone, Dr. Niesen’s research emphasis has been on the ecology of introduced marine invertebrate in San Francisco Bay. He has also conducted research in the Caribbean and Bering seas. His hobbies are surfing, diving, swimming, photography and gardening.