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Researchers managed to capture footage of a species that predates most dinosaurs during an expedition to the bottom of the ocean in a sub.
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The abnormal behavior has raised special concerns about the endangered smalltooth sawfish, an odd-looking ray with chainsaw-like teeth, as 28 of them have died
It was a critical rescue for a critically endangered animal.
A smalltooth sawfish was rescued from the Florida Keys on last week, a first for researchers who have been trying to find the answer to what has been killing the endangered animal.
Something deadly is lurking through Florida's waters, killing the state's endangered sawfish, yet no one knows what.