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t '~ options have been difficult to develop because its life cycle was poorly understood until recently. (No doubt remoteness of spawning habitats, and difficulty in collecting data in the hostile Colorado River basin were factors). This difficulty was exemplified by attempts to infer movement patterns from tagging programs, which were largely ineffectual (Holden and Wick 1982, Seethaler 1978), As late as 1978, the Colorado Squawfish Recovery Plan (USFWS 1978) stated that spawning migrations of adults had not been reported in 10 years, and no knowledge of spawning areas, nursery habitats, or concentration areas were indicated. The environmental movement, energy crisis, and water development issues of the 1970's intensified research efforts on the rare and endangered Colorado River fishes, including the Colorado River Fishes Project, a cooperative interagency effort that resulted in the establishment of 3 field research stations (Miller et al 1982a, Wydoski and Hamill this volume). Increased t ~.r research and management efforts reflected by a sudden proliferation of literature (reviewed by Wydoski et al 1980), and special symposia (e.g. Miller ~? et al 1982, Spofford et al 1984).~Attempts at management of these species by the implementation of flow and non-flow related measures are recent ~ ~ S vL~h~ V{i developments, and center largely around authorities ~n~h seat-in the Section 7 of the Endangered Species Act (Lambertson 1982). This presentation summarizes current knowledge of the life cycle, status, and management options for Colorado squawfish, using published and previously unpublished data. Emphasis is placed on management for recovery of the fish in the Green River basin, where it is most widely distributed, most abundant, and its ecological requirements are best known. 3