WASHINGTON, Sept. 20 -- The U.S. Department of the Interior's U.S. Fish and Wildlife Service issued the following news release: Based on the best available science, the U.S. Fish and Wildlife Service is proposing to list the subterranean Miami cave crayfish as a threatened species under the Endangered Species Act with an accompanying section 4(d) rule. The Service is not proposing to designate critical habitat at this time. The Miami cave crayfish (Procambarus milleri) is found exclusively un  more