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  1. NOAA Fisheries
    https://www.fisheries.noaa.gov › feature-story

    12 Shark Facts That May Surprise You - NOAA Fisheries

    • Learn about shark anatomy, vision, electroreception, skin, age, color, and more from NOAA experts. Discover how sharks differ in size, teeth, reproduction, and fossilization.… See more

    Sharks Do Not Have Bones.

    Sharks use their gills to filter oxygen from the water. They are a special type of fish known as "elasmobranchs", which translates into fish made of cartilaginous tissues—th… See more

    NOAA Fisheries
    Most Sharks Have Good eyesight.

    Most sharks can see well in dark lighted areas, have fantastic night vision, and can see colors. The back of sharks’ eyeballs have a reflective layer of tissue called a tapetum. T… See more

    NOAA Fisheries
    Shark Skin Feels Similar to sandpaper.

    Shark skin feels exactly like sandpaper because it is made up of tiny teeth-like structures called placoid scales, also known as dermal denticles. These scales point towards th… See more

    NOAA Fisheries
    Sharks Have Been Around A Very Long time.

    Based on fossil scales found in Australia and the United States, scientists hypothesize sharks first appeared in the ocean around 455 million years ago. Vertebrae c… See more

    NOAA Fisheries
    Are sharks a real thing?
    Sharks are some of the most captivating and mysterious creatures that inhabit our oceans. With their sleek bodies, sharp teeth, and ancient lineage, sharks have captured the imagination of humans for centuries.
    sharktruth.com
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    Table of Contents
    Sharks Do Not Have Bones.
    Most Sharks Have Good eyesight.
    Shark Skin Feels Similar to sandpaper.
    Sharks Have Been Around A Very Long time.
    Are sharks a real thing?
     
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