- published: 16 Dec 2016
- views: 14112
National Geographic or NatGeo may refer to:
Sharks are a group of fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachimorpha (or Selachii) and are the sister group to the rays. However, the term "shark" has also been used for extinct members of the subclass Elasmobranchii outside the Selachimorpha, such as Cladoselache and Xenacanthus, as well as other Chondrichthyes such as the holocephalid eugenedontidans. Under this broader definition, the earliest known sharks date back to more than 420 million years ago.Acanthodians are often referred to as "spiny sharks"; though they are not part of Chondrichthyes proper, they are a paraphyletic assemblage leading to cartilaginous fish as a whole.
Since then, sharks have diversified into over 500 species. They range in size from the small dwarf lanternshark (Etmopterus perryi), a deep sea species of only 17 centimetres (6.7 in) in length, to the whale shark (Rhincodon typus), the largest fish in the world, which reaches approximately 12 metres (40 ft) in length. Sharks are found in all seas and are common to depths of 2,000 metres (6,600 ft). They generally do not live in freshwater although there are a few known exceptions, such as the bull shark and the river shark, which can survive and be found in both seawater and freshwater. Sharks have a covering of dermal denticles that protects their skin from damage and parasites in addition to improving their fluid dynamics. They have several sets of replaceable teeth.
Class may refer to:
National may refer to:
Shark Tank is an American reality television series that premiered August 9, 2009, on ABC. The show is a franchise of the international format Dragons' Den, which originated in Japan in 2001. Shark Tank shows aspiring entrepreneur-contestants make business presentations to a panel of "shark" investors, who then choose whether or not to invest.
The show is currently in its seventh season, and has been a ratings success in its timeslot. It has also won the Primetime Emmy Award for Outstanding Structured Reality Program twice. Two further adaptations of the Dragons' Den format, one in Australia and one in Portugal, have been named Shark Tank. A third, an Italian version, was announced but has not aired.
Shark Tank is produced by Mark Burnett and based on the international format Dragon's Den, which originated in 2001 with the Japanese show Tigers of Money. The show, however, more closely resembles the format of the British version, Dragons' Den, which premiered in 2005. The show features a panel of potential investors, called "sharks," who consider offers from aspiring entrepreneurs seeking investments for their business or product. The sharks are paid for their participation in the show, but the money they invest is their own. The entrepreneur can make a deal on the show if a panel member is interested. However, if all of the panel members opt out, the entrepreneur leaves empty-handed. The show is said to portray "the drama of pitch meetings and the interaction between the entrepreneurs and tycoons." A one-hour pitch by a contestant is edited down to "a dramatic 10-minute segment."
The pointy-nosed blue chimaera, a species of "ghost shark," was captured on camera for the first time in 2009. Video courtesy Monterey Bay Aquarium Research Institute. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible. Get More National Geographic: Official Site: http://bit.ly/NatGeoOfficialSite Facebook: http://bit.ly/FBNatGeo Twitter: http://bit.ly/NatGeoTwitter Instagram: http://bit.ly/NatGeoInsta Previously discovered in the deep sea near Australia, New Zealand, and New Caledonia, researchers observed ...
After 450 million years swimming in the ocean, some shark species are on the verge of extinction - mainly due to overfishing. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible. Get More National Geographic: Official Site: http://bit.ly/NatGeoOfficialSite Facebook: http://bit.ly/FBNatGeo Twitter: http://bit.ly/NatGeoTwitter Instagram: http://bit.ly/NatGeoInsta Shark Alert! Species Struggle | National Geographic https://youtu.be/iMDYO_4eWbE National Geographic https://www.youtube.com/natgeo
Kids love PINKFONG Songs in China where I'm teaching! They are crazy about baby shark! Great job guys and thanks to make the kids happy to learn English ;) Find PINKFONG Links below. Follow Mike's Home on Facebook, Youtube and Twiter for new updates. ★ WEBSITE: http://www.mikeshomesl.com/ ★ YouTube Channel: https://www.youtube.com/user/misteurflo ★ Facebook: https://www.facebook.com/MikesHome1/ ★ Twitter : https://twitter.com/Mike_s_Home Subscribe to PINKFONG's YouTube channel for hundreds of kids' favorite songs and stories, including phonics songs, nursery rhymes, bedtime lullabies, children's classics, fairy tales and more! Enjoy educational songs and stories for preschool kids created by the experts in children's education. Follow us...
Watch Energizers! author Susan Roser as she leads NEFC staff members through the Energizer Shark Attack.
A great white shark breaks through a diving cage near Guadalupe Island, Mexico. Video credit: Brian Ernst ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible. Get More National Geographic: Official Site: http://bit.ly/NatGeoOfficialSite Facebook: http://bit.ly/FBNatGeo Twitter: http://bit.ly/NatGeoTwitter Instagram: http://bit.ly/NatGeoInsta A great white shark slammed through the side of a safety cage during an excursion by a diving company off Guadalupe Island, Mexico, on October 4. Darting at some bait se...
Dr. Dustin York goes onto the Shark tank and pitches Maryville University's COMM 121 - Intro to Contemporary Communication.
Sharks swimming in the mall or subway? Huge shark tank breaks leaving deadly sharks swimming in a mall lobby! We're gonna need a bigger boat! There is a reason this image went viral and its not because of people's fear of escalators. And yes, there is a real phobia of escalators its called Escalaphobia, google it, I can't make this kind of stuff up! This image hit all of the social media outlets. Like Facebook, Tumblr and Twitter According to one of the stories accompanying the picture, a giant shark tank at the Scientific Center in Kuwait collapsed, causing panic and chaos among staff and visitors. Another claimed the collapse occurred flooding the lobby of Kuwaiti shopping mall. Upon being confronted with such an event occurring at the mall you have to ask yourself... #1 Is this...
Sam Tageson, a lifelong San Jose Sharks fan with a health condition, gets to realize his dream of practicing and skating on the ice as a member of the Sharks.
The pointy-nosed blue chimaera, a species of "ghost shark," was captured on camera for the first time in 2009. Video courtesy Monterey Bay Aquarium Research Institute. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible. Get More National Geographic: Official Site: http://bit.ly/NatGeoOfficialSite Facebook: http://bit.ly/FBNatGeo Twitter: http://bit.ly/NatGeoTwitter Instagram: http://bit.ly/NatGeoInsta Previously discovered in the deep sea near Australia, New Zealand, and New Caledonia, researchers observed ...
After 450 million years swimming in the ocean, some shark species are on the verge of extinction - mainly due to overfishing. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible. Get More National Geographic: Official Site: http://bit.ly/NatGeoOfficialSite Facebook: http://bit.ly/FBNatGeo Twitter: http://bit.ly/NatGeoTwitter Instagram: http://bit.ly/NatGeoInsta Shark Alert! Species Struggle | National Geographic https://youtu.be/iMDYO_4eWbE National Geographic https://www.youtube.com/natgeo
Kids love PINKFONG Songs in China where I'm teaching! They are crazy about baby shark! Great job guys and thanks to make the kids happy to learn English ;) Find PINKFONG Links below. Follow Mike's Home on Facebook, Youtube and Twiter for new updates. ★ WEBSITE: http://www.mikeshomesl.com/ ★ YouTube Channel: https://www.youtube.com/user/misteurflo ★ Facebook: https://www.facebook.com/MikesHome1/ ★ Twitter : https://twitter.com/Mike_s_Home Subscribe to PINKFONG's YouTube channel for hundreds of kids' favorite songs and stories, including phonics songs, nursery rhymes, bedtime lullabies, children's classics, fairy tales and more! Enjoy educational songs and stories for preschool kids created by the experts in children's education. Follow us...
Watch Energizers! author Susan Roser as she leads NEFC staff members through the Energizer Shark Attack.
A great white shark breaks through a diving cage near Guadalupe Island, Mexico. Video credit: Brian Ernst ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible. Get More National Geographic: Official Site: http://bit.ly/NatGeoOfficialSite Facebook: http://bit.ly/FBNatGeo Twitter: http://bit.ly/NatGeoTwitter Instagram: http://bit.ly/NatGeoInsta A great white shark slammed through the side of a safety cage during an excursion by a diving company off Guadalupe Island, Mexico, on October 4. Darting at some bait se...
Dr. Dustin York goes onto the Shark tank and pitches Maryville University's COMM 121 - Intro to Contemporary Communication.
Sharks swimming in the mall or subway? Huge shark tank breaks leaving deadly sharks swimming in a mall lobby! We're gonna need a bigger boat! There is a reason this image went viral and its not because of people's fear of escalators. And yes, there is a real phobia of escalators its called Escalaphobia, google it, I can't make this kind of stuff up! This image hit all of the social media outlets. Like Facebook, Tumblr and Twitter According to one of the stories accompanying the picture, a giant shark tank at the Scientific Center in Kuwait collapsed, causing panic and chaos among staff and visitors. Another claimed the collapse occurred flooding the lobby of Kuwaiti shopping mall. Upon being confronted with such an event occurring at the mall you have to ask yourself... #1 Is this...
Sam Tageson, a lifelong San Jose Sharks fan with a health condition, gets to realize his dream of practicing and skating on the ice as a member of the Sharks.
Subscribe to the Military Channel the largest channel on Youtube for military content !
Subscribe for the largest channel on youtube for documentaries!
Subscribe! the largest military docus channel on youtube
National Geographic Russian Typhoon Shark World s Biggest Ballistic Missile Nuclear Submarine ---------- All our videos for just education. Subscribe our channel and facebook page to watch our new uploads: https://www.facebook.com/PopularDocumentaries Thanks