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Tiktaalik Roseae: Tiktaalik is a genus of extinct sarcopterygian (lobe-finned) fish from the late Devonian period, with many features akin to those of tetrapods (four-legged animals). It is an example from several lines of ancient sarcopterygian fish developing adaptations to the oxygen-poor shallow-water habitats of its time, which led to the evolution of amphibians. Well-preserved fossils were found in 2004 on Ellesmere Island in Nunavut, Canada.