what is the shallow part of the sea off the coast of

Boston called?

Continental shelf

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The shallow part of the sea off the coast of Boston is called the Boston Harbor. To find this answer, you can start by conducting a simple internet search using a search engine like Google or Bing. By typing in "shallow part of the sea off the coast of Boston," you should be able to locate information about the Boston Harbor. Additionally, you can consult relevant maps or nautical charts that show the coastal regions and bodies of water in the Boston area.