Related Clues:

• At first really envious, eying fine part of sail
• Coral conglomeration
• Cycling without restriction rocks?
• Underwater coral structure
• Shipwreck site, maybe
• Wreck site, at times
• Diving spot
• Popular scuba site
• Sea anemone habitat
• Sailing danger
• Biodiverse ecosystem
• Snorkeling destination
• Ecosystem built by corals
• Habitat becoming bleached by global warming
• It's about to end malpractice ahead of failings, as it's a danger to shipping