Humphrey the Whale is a humpback whale that twice deviated from his Mexico to Alaska migration by entering San Francisco Bay. This behavior is unusual for a humpback whale, and Humphrey attracted wide media attention when entering the bay in both 1985 and 1990. Both of his bay incursions resulted in rescue by the Marine Mammal Center, based in Marin County, California, assisted by the United States Coast Guard and hundreds of other volunteers. The last sighting of Humphrey was in the vicinity of the Farallon Islands in 1991. Description The humpback whale is a mammal that belongs to the baleen whale suborder. An adult usually ranges between long and weighs approximately , or . It is well known for its breaching, its unusually long front fins, and its complex whale song. The humpback whale lives in oceans and seas around the world. Humpback whales have a stocky body with well-defined humps and black upper elements. The head and lower jaw are covered with knobs called tubercles, which are actually hair follicles and are characteristic of the species. The tail flukes, which are lifted high in the dive sequence, have wavy rear edges. Individual humpbacks have unique patterns on their long black and white tail fin and pectoral fins that allow scientists to positively identify them. Humphrey's journeys inland 1985 In 1985, a humpback entered San Francisco Bay and was followed closely on the evening news by Bay Area television stations. After a few days in the bay, the whale, nicknamed Humphrey, swam up the Sacramento River into a freshwater habitat. The whale, first spotted at Oakland's Outer Harbor October 10, 1985, swam up the Carquinez Strait, the Sacramento River and under the Rio Vista Bridge to a dead-end slough from the ocean. Numerous attempts to coax him back to the ocean failed. One initial attempt involved playing sounds of orcas to frighten Humphrey into leaving. Another attempt was made using a "sound net" in which people in a flotilla of boats made unpleasant noises behind the whale by banging on steel pipes, a Japanese fishing technique known as "oikomi". Several weeks of being trapped in the fresh water of the Sacramento Delta brought signs of physical stress in the whale. His skin was graying and he was becoming more and more listless. None of the traditional herding techniques were working, and Humphrey appeared to be dying. As a last-ditch