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The sea floor constantly changes because of:

  • dredging
  • sand piling up
  • storms leaving debris behind.


Cobalt's Boat is almost overturned!

Mystery 1 - What Did Cobalt Need to Avoid Hitting the Rock?

Did you know?

In 2005, Hurricane Katrina caused damage to the Gulf of Mexico coastal region, and left huge amounts of trash, known as marine debris. Underwater marine debris poses a hazard to boat traffic. NOAA’s Marine Debris Program tries to identify and remove marine debris. Learn more at


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