Associated Press: Sky enemy fish species along the Colorado River come to the ancient seat -collar -sitting fossil fish to survive

China Well -off, July 7th. For the National Park Administration's fishery biologist Jeff Arnold, this is a moment he has always been afraid. Last week, he was wearing sandals barefoot. When he pulled nets in the shallow water area in the lower reaches of the Colorado River, he found three juveniles that did not belong to it. "I would call me with this situation." He immediately sent a message to his colleagues and sent a photo.

Children's small mouth bass

The Associated Press AP reported that a few minutes later, the park service department confirmed the situation they were most worried about: in fact, small -mouth sea bass had been found, and they were likely to breed in the Colorado River under the Galey Canyon Dam.

They may be a kind of favorite sports fish, but the small mouth bass is eaten with a seat head, the latter is an ancient threatening fish, native to the river, biologists like Arnold have been working hard to work hard Restore the population. The predator caused severe damage to catfish upstream, but was trapped along the coast of Lake Powell. The Galen Canyon Dam has been used as a barrier for many years, until now. The nearest water level of the reservoir has dropped sharply, so that these shifting fish can cross the dam and closer to the largest catfish group in the lower reaches of the Grand Canyon.

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