Taiwan fishermen catch rare bluntnose sixgill shark Bluntnose sixgill sharks date back 200 million years to Triassic period Jul. 18, 2022 15:55# Triassic period# bluntnose sixgill shark# living fossilBluntnose sixgill sharks date back 200 million years to Triassic period # Triassic period# bluntnose sixgill shark# living fossil