The U.S. Fish and Wildlife Service is reopening the comment period on their December 9, 2009 proposed revised designation of critical habitat for Santa Ana sucker (Catostomus santaanae) under the Endangered Species Act. The comment period will be open for an additional 30 days to allow all interested parties an opportunity to comment simultaneously on the proposed revised critical habitat designation, the draft economic analysis associated with the proposed critical habitat designation, proposed revisions to proposed critical habitat in one subunit, the considered exclusion of critical habitat in two subunits, and the amended Required Determinations section of the preamble. The USFWS has provided a list of specific information that they are particularly interested in collecting comments on. There is also an announcement of the location and time of a public hearing to receive public comments on the proposal.