Related Clues:
- Salty water
- They're heavy during storms
- Jellyfish habitats
- Of which there are way more than seven in the world
- Waters numbering seven
- Briny seven
- Earthly septet
- Cargo weights, perhaps
- Caspian and Aegean
- They can be pirated
- Bodies of water numbering seven
- Sailor's septet?
- The Red and Black
- Huge quantities
- Salty bodies