Historical clue formulations

• Part of many a shallow-water ecosystem — 2026-09-09
• "Finding Nemo" setting — 2026-05-26
• Endangered underwater ecosystem — 2025-09-29
• Snorkeling site — 2025-07-15
• Ecosystem for an estimated 25% of all marine species — 2025-03-23
• Natural barrier — 2024-09-15
• Ecosystem formed by polyps — 2024-09-01
• Biodiverse underwater ecosystem — 2024-08-21
• Where to find a very wet sponge — 2024-05-16
• Surf turf? — 2024-03-27
• Destination for scuba divers — 2024-03-13
• Danger for a mariner — 2023-12-20
• Moray's habitat — 2023-09-05
• Shipwreck site — 2023-08-30
• Habitat threatened by bleaching — 2022-11-20
• Site for sponges — 2022-08-24
• ___ shark — 2022-07-21
• Diver's destination — 2022-06-26
• Diverse ecosystem — 2022-05-01
• Place to find brain coral — 2022-04-26
• Area with lots of schools — 2021-08-28
• Hazard in maritime travel — 2021-08-12
• Home of Marlin and Nemo in "Finding Nemo" — 2021-08-10
• Habitat becoming bleached by global warming — 2021-07-01
• Ecosystem built by corals — 2021-06-28
• Diving spot — 2020-12-12
• Shipwreck site, maybe — 2020-11-20
• Natural feature near Queensland — 2020-08-01
• Biodiverse habitat — 2020-06-07
• Many a scuba destination — 2019-09-12
• Sound barrier? — 2019-02-09
• Home for a clown fish — 2018-08-29
• Shipwreck site, perhaps — 2018-03-19
• Shallow water obstacle — 2017-11-21
• Coral formation — 2017-09-26
• Where to find some very wet sponges — 2017-06-04
• Place for a sponge — 2017-02-26
• Place divers explore — 2017-02-07
• Coral bleaching locale — 2016-12-25
• Skin diving locale — 2016-12-18
• See 41-Across — 2016-05-03
• Good area for snorkeling — 2015-09-29
• Bikini feature — 2015-07-10
• Boater's hazard — 2015-07-01
• The Keys, essentially — 2015-05-02
• Feature of Hawaii's Molokini Crater — 2015-03-15
• Good snorkeling locale — 2015-02-04
• Shipping hazard — 2014-10-04
• Snorkeling spot — 2014-07-30
• Snorkeling locale — 2014-05-18