Related Clues:

• Tortoise topper
• Sea item sold by 39-Down, in a tongue-twister
• Mussels marinara discard
• Son having nightmare sees skeleton
• Hard cover, often?
• Racing craft
• Conch, perhaps
• Use artillery for cover
• Oyster's "home"
• Aquatic dipper, one of a pair
• Shell for a crew
• Skeleton causing son a nightmare
• A boat or its oar
• Blitz auction held outside hotel
• Row headcase reported