| Knot |
| Atoll |
| Shoal |
| Riffle |
| Barrier |
| Cal ___ |
| Sand bar |
| Coral ___ |
| Key, e.g. |
| Mine vein |
| Sail part |
| Sail tuck |
| Sea hazard |
| Sand ridge |
| Coral line |
| Scuba site |
| Coral mass |
| Scuba spot |
| Wreck site |
| Ship hazard |
| Coral shelf |
| Nemo's home |
| Trim a sail |
| Coral strip |
| Reduce sail |
| Scuba venue |
| Coral ridge |
| Key feature? |
| Coral design |
| Coral growth |
| Lagoon sight |
| Marine peril |
| Atoll former |
| Coral hazard |
| Coral strand |
| Keel scraper |
| Lower a spar |
| Ocean hazard |
| Ship wrecker |
| Shorten sail |
| Diver's place |
| Atoll feature |
| Atoll barrier |
| Coral expanse |
| Coral product |
| Diver's haunt |
| Scuba setting |
| Seaman's knot |
| Coral barrier |
| Key structure |
| Unseen hazard |
| Water hazard? |
| Coral buildup |
| Ship's hazard |
| Reduce a sail |
| Coral habitat |
| Marine hazard |
| Coral creation |
| Atoll's makeup |
| Sound barrier? |
| Boating hazard |
| Sailing hazard |
| A kind of knot |
| Sailor's dread |
| Shipwreck site |
| Ship's nemesis |
| Atoll, for one |
| Coral environs |
| Lagoon creator |
| Part of a sail |
| Pilot's hazard |
| Sailing danger |
| Sailor's peril |
| Scubaing place |
| Shorten a sail |
| Undersea ridge |
| Bikini feature |
| Lagoon barrier |
| Ocean obstacle |
| Diver's domain |
| Offshore ridge |
| Ridge of coral |
| Snorkeling spot |
| Coral structure |
| Coral formation |
| Nautical hazard |
| Shipping hazard |
| Atoll component |
| Yachting hazard |
| Snorkeling site |
| Boater's hazard |
| Natural barrier |
| Aquatic habitat |
| Aquatic barrier |
| Atoll formation |
| Sailboat hazard |
| Sea-diving area |
| Site of a wreck |
| Coral ecosystem |
| Coral construct |
| Mariner's peril |
| Shipwreck cause |
| Nautical danger |
| Offshore hazard |
| Atoll protector |
| Mariner's hazard |
| Shipwreck locale |
| Coral collection |
| Marine ecosystem |
| Part of an atoll |
| Snorkeling venue |
| Submerged hazard |
| Submerged threat |
| Underwater knoll |
| Coral Sea hazard |
| Lagoon perimeter |
| Snorkelers' site |
| Underwater ridge |
| Snorkeler's haunt |
| Navigation hazard |
| Snorkeling locale |
| Clownfish habitat |
| Diverse ecosystem |
| Ocean obstruction |
| Reduce, as a sail |
| Scuba diving area |
| Submerged barrier |
| Great Barrier ___ |
| Subsurface hazard |
| Hazard for a hull |
| Damselfish's home |
| Underwater hazard |
| Erosion by-product |
| Haven for sea life |
| Hesperus's undoing |
| Place for a sponge |
| Shorten, as a sail |
| Skin diving locale |
| The Great Barrier. |
| Atoll, essentially |
| Biodiverse habitat |
| Boat bottom basher |
| Natural breakwater |
| Underwater habitat |
| Boat-bottom bumper |
| Coral construction |
| Boat bottom scraper |
| Coral-viewing venue |
| Great Barrier e.g. |
| Menace for mariners |
| Snorkler's interest |
| Spot for snorkelers |
| Spot for snorkeling |
| Underwater obstacle |
| Good snorkeling spot |
| It's a great barrier |
| Old 97s "Barrier ___ |
| Place divers explore |
| Rocky ridge offshore |
| Shallow-water hazard |
| Place for snorkeling |
| Hazardous obstruction |
| Home for a clown fish |
| Spot for some schools |
| The Keys, essentially |
| Tropical fish hangout |
| Coral shipping hazard |
| Large coral formation |
| Diver's site, perhaps |
| Coral bleaching locale |
| Good snorkeling locale |
| Great place to snorkel |
| Lagoon's coral barrier |
| Shallow water obstacle |
| Snorkeling destination |
| Squirrelfish's habitat |
| Place for scuba diving |
| Great Barrier, for one |
| Shipwreck site, perhaps |
| Snorkeler's destination |
| Where ships run aground |
| Ocean's coral structure |
| Site of many a shipwreck |
| Good area for snorkeling |
| Hazard near Norman's Woe |
| Vibrant marine ecosystem |
| Offshore coral structure |
| Setting for some schools |
| Site of a wreck, perhaps |
| Snorkeling spot, perhaps |
| Donovan's ___": 1963 film |
| Coral-encrusted structure |
| Feature of N.E. Australia |
| Unseen danger for boaters |
| Coral site for snorkeling |
| It's just below the waves |
| Coral formation in the sea |
| Shipwreck cause, sometimes |
| Great Barrier of Australia. |
| Where ships may run aground |
| Wreck of the Hesperus cause |
| Great Barrier of Queensland. |
| Ridge just below the surface |
| Coral formation in the ocean |
| Coral structure in the ocean |
| Site of a shipwreck, perhaps |
| '90s "Place Your Hands" band |
| The Florida Keys, essentially |
| Wayne's "Donovan's ___": 1963 |
| Australia's Great Barrier ___ |
| Britpop band with "Glow" album |
| Home to Nemo, in "Finding Nemo |
| Home to Nemo, in a Pixar movie |
| Popular snorkeling destination |
| U.K. band that had "Glow" album |
| Where a yacht might run aground |
| Snorkeling destination, perhaps |
| Submerged ridge of rock or coral |
| Usually splendid snorkeling site |
| Coral ___ (place to go snorkeling) |
| It might be just below the surface |
| Feature of Hawaii's Molokini Crater |
| Ridge of coral near the sea surface |
| Where to find some very wet sponges |
| Great Barrier ___ (Australian attraction) |
| Won't somebody get me off of this ___" Sublime |
| Bank of jagged rock near the surface of the sea |
| Great Barrier ___ (Australian natural attraction) |
| Something for snorkelers to look at but not touch |