Demon Zuo is the most peculiar fish on the world, also be the most precious at the same time with one of old live thing. They are in the United States the difference in temperature of dead gorge day and night of Nevada is great, fountainhead tall salinity, anoxic lived tens of thousands of years below harsh environment. Dead gorge is in glacial times, freely of here water system. The Zuo fish with not big build, it is with respect to perch since glacial times over there, the biologist call his " developmental miracle " , people says it again " demon Zuo " . Come 60 thousand years, "Demon Zuo " conquer the severe cold of glacial times, kept back of desert climate broiling, in hole of dead cereal devil increasingly contractible habitat lived tenaciously to come down. Suffer agriculture to irrigate influence, local underground water level drops somewhat, make area of Zuo fish habitat ceaseless and contractible. Go up century at the beginning of 90 time, the Zuo fish of dead cereal has many 500 only. Now, 38 when the whole world puts only " demon Zuo " whole life is close in devil hole 150 rice, wide in a few pond of rice. Because this is included by the United States,also be in severe danger first species list of species protection bill. Once 3 men were killed secondhand " demon Zuo " , after be being discovered by order circularly the arrest of a criminal at large of American whole nation, from now on later " demon Zuo " the life got ameliorative. To protect them, tourist will be restricted when visiting devil hole, the 2.4 meters tall, crawl erect that takes wire is in pond all around. Want to know, although Zuo fish is small, mix with giant polar bear however giant panda is euqally precious. Because demon Zuo distributings only at Nevada this narrow, gross area is only in the urine pond of tens of square metre, some closer bizarre ground reduces year of Zuo fish amount, can find no way out of your zoology expert.