Crayfish, Australia
A foot-long crayfish dodges a hiker fording a stream in Australia's Claustral Canyon. The color of these crayfish, called yabbies by canyoneers, remains a puzzle. In some streams they're orange. In others they're blue. The difference is due partly to water purity—the blue ones are found in the clearest water.
澳大利亞,小龍蝦
澳大利亞Claustral峽谷的小溪中,一只龍蝦正在躲避涉水而過的行者
。這種小龍蝦(小形螫蝦的一種)很神奇,除了這種顏色,還有橘紅色和藍色的 。這是由于水源的純度決定的,藍色表示,小龍蝦生活的水域很清潔 。