| REEF | "Coral" or "barrier" ending |
| REEF | "Finding Dory" coral formation |
| REEF | "Finding Nemo" coral formation |
| REEF | 6 Down component |
| REEF | A tall one might scrape a keel |
| REEF | Aquatic barrier |
| REEF | Area with lots of schools |
| REEF | Artificial construction on some barren seafloors |
| REEF | Atoll |
| REEF | Atoll barrier |
| REEF | Atoll protector |
| REEF | Atoll, essentially |
| REEF | Australia's Great Barrier |
| REEF | Australia's Great Barrier __ |
| REEF | Australia's Great Barrier ___ |
| REEF | Australian natural wonder, the Great Barrier ___ |
| REEF | Barrier __ |
| REEF | Barrier ____ |
| REEF | Big attraction of the Arrecifes de Cozumel National Park |
| REEF | Bikini feature |
| REEF | Biodiverse habitat |
| REEF | Boater's hazard |
| REEF | Boating hazard |
| REEF | Capitol ___, national park in Utah famous for its rocky landscape |
| REEF | Cause of grounding |
| REEF | Chain of coral |
| REEF | Colorful ecosystem |
| REEF | Coral Sea hazard |
| REEF | Coral __ |
| REEF | Coral ___ |
| REEF | Coral ___ (marine life haven) |
| REEF | Coral ___ (place to go snorkeling) |
| REEF | Coral ___ (snorkeler's destination) |
| REEF | Coral ___ (snorkeling site) |
| REEF | Coral ___, underwater coral expanse that you may spot at an island |
| REEF | Coral ____ |
| REEF | Coral bank |
| REEF | Coral barrier |
| REEF | Coral bleaching locale |
| REEF | Coral conglomeration |
| REEF | Coral construct |
| REEF | Coral construction |
| REEF | Coral creation |
| REEF | Coral ecosystem |
| REEF | Coral environs |
| REEF | Coral expanse |
| REEF | Coral formation |
| REEF | Coral formation (rhymes with "beef") |
| REEF | Coral formation in the ocean |
| REEF | Coral formation in the sea |
| REEF | Coral formation that's a tropical fish hangout |
| REEF | Coral growth |
| REEF | Coral habitat |
| REEF | Coral mass |
| REEF | Coral paradise |
| REEF | Coral ridge |
| REEF | Coral site for snorkeling |
| REEF | Coral structure |
| REEF | Coral structure in the ocean |
| REEF | Coral structure that divers explore |
| REEF | Coral's home |
| REEF | Coral-encrusted structure |
| REEF | Damselfish's home |
| REEF | Diver's destination |
| REEF | Diverse ecosystem |
| REEF | Diving spot |
| REEF | Dory's underwater home, in "Finding Dory" |
| REEF | Ecosystem built by corals |
| REEF | Ecosystem endangered by climate change |
| REEF | Feature of Hawaii's Molokini Crater |
| REEF | Formation that could damage the bottom of a ship |
| REEF | Formation that might be explored by a snorkeler |
| REEF | Free to construct atoll matter |
| REEF | Free to swim round atoll |
| REEF | Free to wander sandbar |
| REEF | Free travel to ridge |
| REEF | Good area for snorkeling |
| REEF | Good snorkeling locale |
| REEF | Great Barrier __ |
| REEF | Great Barrier ___ |
| REEF | Great Barrier ___ (Australia's coral hub) |
| REEF | Great Barrier ___ (Australian attraction) |
| REEF | Great Barrier ___ (Australian natural attraction) |
| REEF | Great Barrier ___ (Coral Sea formation) |
| REEF | Great Barrier ___ (natural wonder in Australia) |
| REEF | Great Barrier ___ of Australia |
| REEF | Great Barrier ___, Australia |
| REEF | Great Barrier ___, Australian World Heritage Site |
| REEF | Great Barrier ___, natural wonder located in Australia which is also a World Heritage site |
| REEF | Great Barrier ___, popular tourist spot in Australia which is the largest of its kind in the world |
| REEF | Great Barrier ____ |
| REEF | Great Barrier ____ (Australian attraction) |
| REEF | Great Barrier, for one |
| REEF | Great barrier ___ |
| REEF | Great place to snorkel |
| REEF | Habitat becoming bleached by global warming |
| REEF | Habitat explored by a scuba diver |
| REEF | Habitat for parrotfish |
| REEF | Habitat threatened by bleaching |
| REEF | Hazard in maritime travel |
| REEF | Hazardous obstruction |
| REEF | Hazardous rock chain |
| REEF | Home for a clown fish |
| REEF | Home of Marlin and Nemo in "Finding Nemo" |
| REEF | Home to Nemo, in "Finding Nemo" |
| REEF | Home to Nemo, in a Pixar movie |
| REEF | Home to Pixar's Nemo |
| REEF | Island protector |
| REEF | Jagged rock below the sea |
| REEF | Lagoon perimeter |
| REEF | Lagoon surrounder |
| REEF | Lagoon's coral barrier |
| REEF | Lagoon's coral formation |
| REEF | Lagoon's coral structure |
| REEF | Large coral formation |
| REEF | Lower a spar |
| REEF | Many a scuba destination |
| REEF | Marine ecosystem |
| REEF | Marine hazard |
| REEF | Mariner's peril |
| REEF | Moray's habitat |
| REEF | More efficient around bank |
| REEF | Natural barrier |
| REEF | Natural breakwater |
| REEF | Natural feature near Queensland |
| REEF | Nautical danger |
| REEF | Nemo's home |
| REEF | Nemo's underwater home, in "Finding Nemo" |
| REEF | Ocean biome damaged by some sunscreens |
| REEF | Ocean hazard |
| REEF | Ocean's coral structure |
| REEF | Offshore coral structure |
| REEF | Offshore ridge |
| REEF | Part of a sail |
| REEF | Place divers explore |
| REEF | Place for a sponge |
| REEF | Place for snorkeling |
| REEF | Popular scuba site |
| REEF | Ridge of coral |
| REEF | Ridge of coral below the sea |
| REEF | Ridge of free design |
| REEF | Ridge of rugged coral beneath sea surface |
| REEF | Rock or coral just above or below the sea |
| REEF | Rocky barrier |
| REEF | Sailboat hazard |
| REEF | Sailing danger |
| REEF | Sailing hazard |
| REEF | Sailor's dread |
| REEF | Sailor's peril |
| REEF | Scenic place to scuba dive |
| REEF | Scuba diver's destination |
| REEF | Scuba diving area |
| REEF | Scuba venue |
| REEF | Sea's coral structure |
| REEF | Sea-diving area |
| REEF | See 10 Across |
| REEF | See 12 Across |
| REEF | See 41-Across |
| REEF | Setting for some schools |
| REEF | Shallow water obstacle |
| REEF | Ship hazard |
| REEF | Shipping hazard |
| REEF | Shipwreck cause, sometimes |
| REEF | Shipwreck locale |
| REEF | Shipwreck site |
| REEF | Shipwreck site, maybe |
| REEF | Shipwreck site, perhaps |
| REEF | Shoal |
| REEF | Shorten, as a sail |
| REEF | Site of a lot of bleaching, right now |
| REEF | Site of a shipwreck, perhaps |
| REEF | Site of a wreck |
| REEF | Site of many a shipwreck |
| REEF | Skin diving locale |
| REEF | Snorkeler's destination |
| REEF | Snorkeler's haunt |
| REEF | Snorkeler's spot |
| REEF | Snorkeler's view |
| REEF | Snorkeling destination |
| REEF | Snorkeling locale |
| REEF | Snorkeling site |
| REEF | Snorkeling spot |
| REEF | Snorkeling spot like the Great Barrier |
| REEF | Snorkeling venue |
| REEF | Snorkler's interest |
| REEF | Sound barrier? |
| REEF | Spot for a sponge |
| REEF | Spot for snorkelers |
| REEF | Spot for snorkeling |
| REEF | Submerged ridge |
| REEF | Submerged threat |
| REEF | The Great Barrier ___ |
| REEF | The Keys, essentially |
| REEF | Type of knot |
| REEF | Underwater coral expanse |
| REEF | Underwater coral formation |
| REEF | Underwater coral home, like the Great Barrier |
| REEF | Underwater coral structure |
| REEF | Underwater ecosystem (anagram of "free") |
| REEF | Underwater feature |
| REEF | Underwater habitat |
| REEF | Underwater obstacle |
| REEF | Underwater ridge |
| REEF | Utah's Capitol __ National Park |
| REEF | Vibrant ecosystem |
| REEF | Vibrant marine ecosystem |
| REEF | Water hazard |
| REEF | What a shipwreck may become |
| REEF | Where a yacht might run aground |
| REEF | Where coral lives |
| REEF | Where ships run aground |
| REEF | Where to find some very wet sponges |
| REEF | Where to see sea anemones |
| REEF | Wreck of the Hesperus cause |
| REEF | Wreck site |
| REEF | Wreck site, at times |
| REEF | Wreck site, perhaps |
| REEF | Wreckage site, sometimes |
| REEF | Yachting danger |
| REEF | Yachting hazard |
| REEF | ___ Blower, machine used by SpongeBob in the animated TV series, "SpongeBob SquarePants" |
| REEF | ___ shark |
| REEF | *Cal ___ |