Often between 6-8 times a year, the new or full moon coincides closely in time with the perigee of the moon — the point when the moon is closest to the Earth. These occurrences are often called ...

A spring tide—popularly known as a "King Tide"—refers to the 'springing forth' of the tide during new and full moon. A neap tide—seven days after a spring tide—refers to a period of moderate tides ...

Use the layers to view which sites have been corrected and which sites remain total or partial barriers. Click on the map to learn which species of fish are present at a particular site and view more ...

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