Related Clues:

• Neptune's realm
• Many a Melville setting, with 'the'
• See 14-Across
• Pirate's home, with 'the'
• Expanse
• The Baltic, e.g.
• The deep
• Caribbean, e.g.
• Galilee, e.g.
• Word with snake or quake
• Irish ___
• It may be Red, White...and blue
• See 26-Down
• Part of a Hemingway title
• Kind of cow