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25 de jul. de 2019 · 42K. 8.3M views 4 years ago #NationalGeographic #Sharks #Educational. Sharks can rouse fear and awe like no other creature in the sea. Find out about the world's biggest and fastest sharks,...
Learn about the world's largest and fastest sharks, how they reproduce, and how some species are at risk of extinction. Find out how sharks are different from other fish, how they interact with humans, and how they are affected by human activities.
Learn about the diversity, importance and vulnerability of sharks and rays, and how WWF works to protect them from overfishing, illegal trade and habitat loss. Explore photos, videos and stories of shark conservation efforts around the world.
Great Lanternshark. Greenland shark. Gulper shark. Kitefin shark. Pacific sleeper shark. Pygmy shark. Spiny dogfish. Sharks in this order have flattened bodies, a mouth with dermal flaps in front of a short snout, nasal barbels, eyes and spiracle on the top of their head, and lack an anal fin. Angel shark.
13 de jun. de 2005 · Learn about shark diversity, behavior, ecology, and threats from this article by National Geographic. Find out how sharks are related to humans, how they breathe, how they reproduce, and why they are endangered.
4 de may. de 2024 · Learn about sharks, the cartilaginous fishes of predatory habit that have more than 400 living species. Find out their characteristics, habitats, diets, reproduction, and threats from overfishing and human interactions.
Etymology. Until the 16th century, sharks were known to mariners as "sea dogs". This is still evidential in several species termed "dogfish," or the porbeagle.The etymology of the word shark is uncertain, the most likely etymology states that the original sense of the word was that of "predator, one who preys on others" from the Dutch schurk, meaning 'villain, scoundrel' (cf. card shark, loan ...
