Historical clue formulations

• Sunken ship sites — 2018-10-14
• Ocean bottoms — 2012-10-08
• Wet bottoms — 2010-04-24
• Divers' milieus — 2007-11-25
• Things fault-finders study — 2004-07-02
• Neptune's gardens — 1997-02-08
• Where oysters sleep? — 1996-12-10
• Ocean floors — 1994-10-29