Meanwhile, aliens including fathead minnows, channel catfish and commoncarp, which would have been hard put to survive in the savage waters of theundammed canyon, have moved in.

• 同时，外来物种包括科罗拉多大白鱼、刀项亚口鱼和粗壮骨尾鱼，本来难以在修坝前的原始水域中生存，却大量的迁入。