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Ginter, Michał (July 2022). "The biostratigraphy of Carboniferous chondrichthyans". Geological Society, London, Special Publications. 512 (1): 769–790. doi: 10.1144/SP512-2020-91. ISSN 0305-8719.
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When rinsing the plastic filter system, you will need to keep spraying with water until the water comes out with a clean appearance. Rinse the dirt container thoroughly. Do Sharks Hold Secret to Human Cancer Fight?". National Geographic. Archived from the original on 2012-01-24 . Retrieved 2006-09-08. a b c "Shark nets". Sharkangels.org. Archived from the original on 2018-09-19 . Retrieved September 18, 2018.Many shark species have brains as complex as mammals, which enables them to process a wide range of senses. Sharks have the same 5 senses as we do plus a couple more... In 2009, the International Union for Conservation of Nature's IUCN Red List of Endangered Species named 64 species, one-third of all oceanic shark species, as being at risk of extinction due to fishing and shark finning. [173] [174]