Related Clues:

• Swell place?
• 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.
• Sea-diving area
• Galilee, e.g.
• Coral formation
• Word with snake or quake
• Irish ___
• It may be Red, White...and blue