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  1. Here are some sea animal fossils you should know about12:
    • Chambered Nautilus: A relative of cuttlefish, squid, and octopuses, the chambered nautilus is the only living cephalopod with a true external shell for protection.
    • Atlantic Horseshoe Crab: A horseshoe crab that has been around for over 450 million years.
    • Crinoid-Coral Pairs: Crinoids, or sea lilies, were animals, sometimes described as seastars on a stick.
    • Coelacanth: A fish that was thought to have gone extinct 66 million years ago, but was rediscovered in 1938.
    • Goblin Shark: A deep-sea shark that has been around for over 125 million years.
    Other marine fossils include trilobites, brachiopods, bryozoans, corals, sponges, and burrows2.
    Learn more:

    Five marine living fossils you should know about

      Five Marine Living Fossils You Should Kn…

      www.whoi.edu/oceanus/feature/five-marine-living-f…

      Marine Fossils

      • Trilobites Grand Canyon’s oldest trilobites are found in the Tonto Group, which is between 525 and 505 million years old. ...

      Fossils - Grand Canyon National Park (U.…

      www.nps.gov/grca/learn/nature/fossils.htm
       
    • People also ask
      Can animals tell us what marine life was like long ago?
      They are rare survivors of ancient lineages and resemble fossils dating back hundreds of millions of years. Many scientists believe these creatures give us a glimpse of what marine life was like long ago. Here are five animals that researchers are studying to learn more about the past and present of life in the ocean.

      Five Marine Living Fossils You Should Know | Woods Hole Oceanograp…

      whoi.edu
      What are living fossils and why are they important?
      Living fossils are among the oldest animals in the ocean. They are rare survivors of ancient lineages and resemble fossils dating back hundreds of millions of years. Many scientists believe these creatures give us a glimpse of what marine life was like long ago.

      Five Marine Living Fossils You Should Know | Woods Hole Oceanograp…

      whoi.edu
      Where did fossils come from?
      The telltale fossils were first discovered a decade ago in Italy's Palombini Shale Formation, which once lay roughly 6,500 feet below the surface of the Cretaceous seas.

      The Oldest Deep-Sea Fish Discovered in Fossil Traces

      scientificamerican.com
      What is the oldest fossil found in the southern hemisphere?
      “We’ll see, we’ll keep digging and see what we can find.” Scientists have discovered a 246 million-year-old marine reptile fossil, the oldest of its kind to be found in the Southern Hemisphere, shining a new light on the early evolution of marine mammals.

      Ancient reptile fossil shines new light on early marine evolution

      cnn.com
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    • Woods Hole Oceanographic Institution
      https://www.whoi.edu/oceanus/feature/five-marine...

      Five Marine Living Fossils You Should Know - Woods Hole …

       
    • National Geographic
      https://www.nationalgeographic.com/a…

      These 5 ‘living fossils’ still roam the Earth - National …

      WEBMar 13, 2024 · 1. Horseshoe crab. This primordial, helmetlike arthropod scuttled across the sandy ocean floors from as early as the Paleozoic (540-248 million years ago), sharing the seas with long gone...

    • Images of Fossils of Sea Animals

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      Quick Guide to Common Fossils — Earth@Home
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