- REEF
- Great Barrier __
- Coral structure
- Ship's bane
- Coral ridge
- Great Barrier ____
- Sailors' hazard
- Coral formation
- Dying Australian habitat :(
- Colorful collection of polyps
- Endangered ocean structure
- Mariner's danger
- Marine hazard
- Shipping hazard
- Coral design
- Coral ___
- Hull hazard
- Shipping problem
- See 15-Across
- Undoing of the Hesperus
- Ship wrecker
- Shipwreck cause
- Shipwreck site
- Scuba setting
- Boater's hazard
- Shallow sea feature
- Diver's milieu
- Keel scraper
- Snorkeling locale
- Key, e.g.
- Good snorkeling locale
- A ship may be intentionally sunk to make one
- It could rub against your junk
- What Moana is repeatedly warned not to go past, in the Disney film "Moana"
- Let go
- The world's largest structure made from living organisms is one
- The Earth's longest one measures over 1400 miles
- Boundary of an 11-Down
- Great Barrier ___
- Boat bottom basher
- Snorkeler's locale
- Underwater hazard
- Buoy locale
- Navigational hazard
- Underwater obstacle
- Atoll, for one
- Boat bottom bumper
- Coral mass
- Ocean obstacle
- Coral outcrop
- Underwater rock ridge
- Possible shipwreck cause
- Coral buildup
- Coral construction
- Snorkeling destination
- Snorkeling site
- Diver's domain
- Sea hazard
- Boating hazard
- Coral creation
- Offshore hazard
- Good snorkeling spot
- Popular snorkeling destination
- Lagoon barrier
- Snorkeling venue
- Atoll's makeup
- Bikini feature?
- Coral-encrusted structure
- Coral-viewing venue
- Underwater ridge
- Coral ecosystem
- Usually splendid snorkeling site
- Place for snorkeling
- Shorten sail
- Great Barrier, for one
- Offshore ridge
- Water hazard
- Mariner's concern
- Ocean danger
- Sailor's concern
- Sailor's worry
- Sailing danger
- Atoll barrier
- Ocean hazard
- Submerged hazard
- It might be just below the surface
- Wreck site
- Diver's haunt
- Yachting hazard
- Biodiverse habitat
- Pilot's hazard
- Atoll former
- Snorkeling spot
- Scuba spot
- Ridge just below the surface
- Scuba diving area
- Navigation hazard
- Submerged threat
- Coral environs
- Barrier __
- Sailing hazard
- Colorful ecosystem
- Coral __
- Snorkeler's destination
- 49-Down spot
- Big name in flip-flops and surfing apparel
- Nemo's home
- 6 Down component
- Underwater habitat
- Sand ridge
- Rocky edge
- Sloop hazard
- Shoal
- Coral barrier
- Nautical danger
- Ridge of rocks
- Sailor's peril
- Mariner's peril
- Ship hazard
- Shorten a sail
- Coral chain
- Nautical hazard
- Snorkelers' site
- Haven for sea life
- Erosion by-product
- Mariner's hazard
- Snorkeling spot, perhaps
- Aquatic habitat
- Backdrop for some schools
- Repurposed shipwreck
- Spot for snorkelers
- Ocean's coral structure
- Sailboat hazard
- Spot for snorkeling
- Clownfish habitat
- Lagoon's coral barrier
- Aquatic barrier
- Lagoon's coral formation
- Lagoon's coral structure
- Sea's coral structure
- Underwater coral structure
- Large coral formation
- What a shipwreck may become
- Capitol ___ (Utah national park)
- Damselfish's home
- Place for scuba diving
- Spot for some schools
- Unseen danger for boaters
- Unseen hazard
- Squirrelfish's habitat
- Shipwreck site, perhaps
- Scubaing place
- The Great Barrier of Australia.
- Obstacle to LST's.
- Norman's Woe.
- Norman's Woe, for instance.
- The Great Barrier of Australia, for instance.
- Australia's Great Barrier ___.
- Great Barrier of Australia.
- Reduce sail.
- Reduce the area of a sail.
- Harbor hazard.
- Great Barrier of Queensland.
- Part of an atoll.
- The Great Barrier.
- Bed of ore, in mining.
- Part of 3 Down.
- Great Barrier.
- Part of a sail.
- Tied-up portion of a sail.
- Part of a sail, rolled and tied.
- Reduction in sail area.
- Norman's Woe, for one.
- Nautical term.
- Cay or key.
- Take in sail.
- Vein, in mining.
- Lagoon feature.
- Vein or lode.
- Coral colony.
- Maritime menace.
- Do a sailor's job.
- Ledge
- Shorten, as a sail.
- Feature of N.E. Australia
- Marine peril
- Ridge of coral
- Lagoon sight
- Lower a spar
- Menace for mariners
- Hesperus's undoing
- Hazard near Norman's Woe
- Riffle
- Ship's hazard
- Sail part
- Reduce a sail
- Wayne's "Donovan's ___": 1963
- Donovan's ___: 1963 film
- Coral strip
- Mine vein
- Trim a sail
- Coral collection
- Rocky ridge offshore
- Sail tuck
- Where ships run aground
- Wreck of the Hesperus cause
- Cause of grounding
- Lagoon perimeter
- Site of a wreck
- Sea-diving area
- Natural barrier
- Atoll protector
- Shipwreck cause, sometimes
- Snorkeler's haunt
- Natural breakwater
- Snorkler's interest
- Where a yacht might run aground
- *Cal ___
- Scuba venue
- Site of many a shipwreck
- Shipwreck locale
- Hazardous obstruction
- Island protector
- Feature of Hawaii's Molokini Crater
- Good area for snorkeling
- The Keys, essentially
- Coral bleaching locale
- See 41-Across
- Skin diving locale
- Place divers explore
- Place for a sponge
- Shallow water obstacle
- Where to find some very wet sponges
- Home for a clown fish
- Many a scuba destination
- Sound barrier?
- Diving spot
- Natural feature near Queensland
- Shipwreck site, maybe
- Area with lots of schools
- Ecosystem built by corals
- Habitat becoming bleached by global warming
- Hazard in maritime travel
- Home of Marlin and Nemo in "Finding Nemo"
- Diver's destination
- Diverse ecosystem
- Habitat threatened by bleaching
- Place to find brain coral
- Site for sponges
- ___ shark
- Danger for a mariner
- Moray's habitat
- Biodiverse underwater ecosystem
- Destination for scuba divers
- Ecosystem formed by polyps
- Surf turf?
- Where to find a very wet sponge
- Hazard for a hull
- Scuba site
- Something for snorkelers to look at but not touch
- Coral deposit
- Coral group
- Coral --
- Old 97s "Barrier ___"
- Won't somebody get me off of this ___ Sublime
- Surfing danger
- Surfing hazard
- Hidden danger of a sort
- Coral Sea hazard
- Schoolhouse?
- Spot for a sponge
- It might be made of sponges
- Rolled and tied sail
- Coral product
- Great Barrier, e.g.
- It's just below the waves
- Atoll feature
- Atoll component
- Key feature?
- Ship's nemesis
- Site of a shipwreck, perhaps
- Where ships may run aground
- Boat bottom scraper
- Diver's site, perhaps
- Ocean obstruction
- Shallow-water hazard
- Scuba diving site
- Place to see anemones
- Sea anemone habitat
- Scuba diving spot
- Great Barrier <P>e.g.
- Sailor's dread
- Atoll formation
- Subsurface hazard
- Coral strand
- Capitol ___ National Park
- Underwater knoll
- Ocean biome damaged by some sunscreens
- It's a great barrier
- Site of a wreck, perhaps
- Snorkeling destination, perhaps
- Home to Nemo, in "Finding Nemo"
- Home to Nemo, in a Pixar movie
- Home to Pixar's Nemo
- Marine ecosystem
- Snorkeler's spot
- Coral conglomeration
- See 17-Across
- Place to snorkel
- Scuba diver's destination
- Coral production
- Shorten sails
- Navigating concern
- The Florida Keys, essentially
- Marine formation
- Marine ridge
- Coral community
- Moray's home
- Tropical fish hangout
- Atoll, essentially
- Setting for some schools
- Vibrant marine ecosystem
- Vibrant ecosystem
- Wreck site, at times
- Popular scuba site
- Yachting danger
- Ecosystem endangered by climate change
- Ecosystem subject to bleaching
- Shipwreck cause, perhaps
