Possible Clues:

• Holders for 49 Down
• Body snatcher's hatchers
• Locust tree features
• Groups of seals
• Nacelles
• Underwater families
• Whale of a lot of seeds in them
• From enclosed cabins see schools of whales?
• There's a whale of a lot of seeds there
• Have there been whales and, by the sound of it, been in them?