The yellowfin cutthroat trout was able to co-exist with the greenback cutthroat with no ill effects from competition. As the Wild West called settlers westward into Colorado, people began fishing the Twin Lakes region there as well as the headwaters to the Arkansas River. Though never confirmed, scientists do speculate the yellowfin cutthroat once lived in that river. Settlers new to the region in the 1880’s did report that a large, ten pound trout with bright yellow fins could be caught in the area. This direct fishing did not seem to impact the yellowfin cutthroat population. In a 1903 effort to have better fishing in the Twin Lakes region, people began stocking rainbow trout into the lakes. Within one year all yellowfin cutthroat trout were gone, unable to survive direct competition with the invasive rainbow trout. Interestingly, the greenback cutthroat trout did survive and would create a hybrid known as the “cutbow”. The greenback cutthroat is the state fish of Colorado and currently listed as threatened with effort put in place to save it from extinction like its yellowfin cutthroat cousin. Although Jurassic Park is fiction, scientists are working on several de-extinction projects. In fact, in 2003 scientists did bring back the extinct Pyrenean ibex, a type of wild goat, for 7 minutes before it died, showing de-extinction is possible. The California condor louse could be a candidate. Scientists would potentially use DNA from one of the specimens kept at the Smithsonian Museum in Washington D.C.. The United States has made many strides in protecting endangered species through many initiatives like the US Endangered Species Act of 1972. Since 1972, many species including the California condor, American bison, bald eagle, black-footed ferret, and grizzly bear have been saved from risk of extinction. If the yellowfin cutthroat trout was brought back to life, would it be able to survive in the Twin Lakes in Colorado?