Related Clues:

• Porpoise's place
• School setting
• Blue part of a map
• Arctic, for one
• Conclusion of "America the Beautiful"
• Coral or Sargasso
• Coral, for one
• Ross, for one
• Shark's place
• It may have a liner on it
• With 23-Across, Neptune, e.g.
• Davy Jones' locker
• Swordfish fishing site
• Irish or Baltic, e.g.
• Whale's home