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  2. Stethacanthidae - Wikipedia

    en.wikipedia.org/wiki/Stethacanthidae

    Stethacanthidae is an extinct family of prehistoric sharks. [1] It is estimated to have existed approximately between 380 and 300 million years ago. Members of this family are noted for their peculiar dorsal fin.

  3. Stethacanthus - Wikipedia

    en.wikipedia.org/wiki/Stethacanthus

    Stethacanthus is an extinct genus of shark-like cartilaginous fish which lived from the Late Devonian to Late Carboniferous epoch, dying out around 298.9 million years ago. Fossils have been found in Australia , Asia , Europe and North America .

  4. Ptychodus - Wikipedia

    en.wikipedia.org/wiki/Ptychodus

    Ptychodus was a large shark, previously estimated at 10 meters (33 feet) long based on extrapolation from teeth. [ 13 ] [ 14 ] The subadult specimen with the largest vertebra showed that it could reach lengths of 4.3–7.07 m (14.1–23.2 ft), so a 10 m (33 ft) length is possible, but more analysis is required for verification.

  5. Zoombezi Bay - Wikipedia

    en.wikipedia.org/wiki/Zoombezi_Bay

    Zoombezi Bay (/ z uː m ˌ b iː z i ˈ b eɪ /) is a 22.7-acre (9.2 ha) water park owned by the Columbus Zoo and Aquarium near Powell, Ohio just north of Columbus. The park sits on the site of the former Wyandot Lake Adventure Park, [1] which was purchased by the Columbus Zoo and Aquarium in 2006. Zoombezi Bay opened to the public on May 26 ...

  6. How can we stop sharks from going extinct? - AOL

    www.aol.com/news/2014-12-18-how-can-we-stop...

    While sharks sit near the top of the food chain in the ocean, their extinction would still have an effect on our life. Without sharks, the ecosystem would be thrown off, triggering changes to the ...

  7. Xenacanthida - Wikipedia

    en.wikipedia.org/wiki/Xenacanthida

    Xenacanthida (or Xenacanthiformes) is an order or superorder of extinct shark-like chondrichthyans (cartilaginous fish) known from the Carboniferous to Triassic. They were native to freshwater, marginal marine and shallow marine habitats. [1] Some xenacanths may have grown to lengths of 5 m (16 ft). [2]

  8. Otodus - Wikipedia

    en.wikipedia.org/wiki/Otodus

    The fossils of Otodus sharks indicate that they were very large macro-predatory sharks. [7] The largest known teeth of O. obliquus measure about 104 millimetres (4.1 in) in height. [8] The vertebral centrum of this species are over 12.7 cm (5 inch) wide. [7] Scientists suggest that O. obliquus would have measured about 8–9 metres (26–30 ft ...

  9. Cretoxyrhina - Wikipedia

    en.wikipedia.org/wiki/Cretoxyrhina

    Cretoxyrhina (/ k r ɪ ˌ t ɒ k s i ˈ r h aɪ n ə /; meaning 'Cretaceous sharp-nose') is an extinct genus of large mackerel shark that lived about 107 to 73 million years ago during the late Albian to late Campanian of the Late Cretaceous.

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