Related Clues:

• Of which there are way more than seven in the world
• Waters numbering seven
• Briny seven
• Earthly septet
• Caspian and Aegean
• They can be pirated
• Bodies of water numbering seven
• Sailor's septet?
• The Red and Black
• Huge quantities
• Salty bodies
• They may be rough
• Briny waters
• Watery expanses
• Beaufort and Bering