Tiktaalik lived approximately 375 million years ago. Paleontologists suggest that it is representative of the transition between fish such as Panderichthys, known from fossils 380 million years old, and early tetrapods such as Acanthostega and Ichthyostega, known from fossils about 365 million years old. Its mixture of fish and tetrapod characteristics led one of its discoverers, Neil Shubin, to characterize Tiktaalik as a "fishapod."
The name Tiktaalik is an Inuktitut word meaning "burbot," a freshwater fish related to true cod. The "fishapod" genus received this name after a suggestion by Inuit elders of Canada's Nunavut Territory, where the fossil was discovered.
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Below: "Life restoration of Tiktaalik roseae made for the National Science Foundation."