Related Clues:

• Blue expanse
• Moby Dick's domain
• Hurricane birthplace
• The Atlantic, for one
• Poseidon's purview
• Triton's realm
• Pacific, for example
• Hogfish habitat
• Atlantis covering
• Surfer's place
• 1492 crossing
• The Indian, for one
• ''Wavy waste,'' to Thomas Hood
• It makes sounds
• Place to use an echograph