Historical clue formulations

• Individual coral organism — 2024-08-06
• Coral reef producer — 2023-01-09
• Coral component — 2021-02-17
• Coral producer — 2013-08-13
• Target of minor surgery — 2013-02-03
• Coral producer — 2008-04-16
• Hydra, for one — 2006-01-29
• Surgery target — 2005-11-27
• Coral producer — 2002-03-31
• Growth — 2001-07-08
• Hydra, e.g. — 1999-01-16
• Nodule — 1997-03-30