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Fish-like features include gills and scales. Tetrapod-like features include rib bones, mobile neck, and evidence that it probably had lungs and was therefore able to breathe in air. Additionally, there are some features which are intermediate between fish and tetrapods, namely limb bones and joints which were similar to tetrapods but ended in fish-like fins rather than toes, and an ear region which seems intermediate between fish and tetrapods.
Tiktaalik is thought to have lived on the bottom of shallow waters, and perhaps even be able to emerge from the water for short periods. It had rows of sharp teeth, eyes on the top of its head (in a similar position to a crocodiles),and was a predator.
Tiktaalik was an a lobe-finned fish with many tetrapod-like characteristics that lived about 375 million years ago
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