​Sea Otters Help Restore Ecosystem Balance

  • A new study highlights how southern sea otters at the Elkhorn Slough National Estuarine Research Reserve in California are consuming 50,000–120,000 invasive green crabs annually, mitigating a significant ecological threat.
  • Native to Europe, green crabs arrived in North America in the 1800s through ship ballast water.

Ship Ballast Water

  • Ship ballast water is water that is stored in a ship's tanks or cargo holds to provide stability and maneuverability. It is used when a ship is not carrying cargo, when the cargo is not heavy enough, or when the ship needs more stability due to ....
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