Possible Questions:
- Snorkeler's haunt
- Atoll component
- Knot
- Coral formation
- Snorkeling site
- Sailing hazard
- Coral structure
- Marine hazard
- Shoal
- Navigation hazard
- Nautical hazard
- Coral ridge
- Coral construction
- Coral creation
- Boating hazard
- Offshore hazard
- Shipping hazard
- Shipwreck site
- Coral habitat
- Sand ridge
- Underwater obstacle
- Shorten sail
- Sea hazard
- Riffle
- Coral ___
- Snorkeling locale
- Reduce a sail
- Nautical danger
- Cal ___
- Boat bottom bumper
- Wreck site
- Snorkeling spot
- Shipwreck locale
- Shipwreck cause, sometimes
- Ship's hazard
- Popular snorkeling destination
- Mine vein
- Key feature?
- It's just below the waves
- Boat-bottom bumper
- Underwater ridge
- Underwater hazard
- Ship wrecker
- Ship hazard
- Sail part
- Reduce sail
- Offshore ridge
- Natural barrier
- Mariner's peril
- Lower a spar
- Keel scraper
- Hazard for a hull
- Great Barrier, e.g.
- Diver's domain
- Damselfish's home
- Coral construct
- Atoll protector
- Atoll feature
- Yachting hazard
- Water hazard
- Unseen hazard
- Subsurface hazard
- Snorkeling spot, perhaps
- Snorkeling destination, perhaps
- Snorkelers' site
- Site of many a shipwreck
- Site of a wreck, perhaps
- Shipwreck site, perhaps
- Shipwreck cause
- Ship's nemesis
- Scuba venue
- Sailor's dread
- Ridge of coral
- Place for snorkeling
- Place for scuba diving
- Ocean obstacle
- Natural breakwater
- Lagoon barrier
- Great Barrier, for one
- Great Barrier ___
- Diver's place
- Coral strand
- Coral mass
- Coral buildup
- Boat bottom basher
- Biodiverse habitat
- Atoll's makeup
- Atoll former
- A kind of knot
- Wreck of the Hesperus cause
- Where ships run aground
- Where ships may run aground
- Where a yacht might run aground
- Wayne's "Donovan's ___": 1963
- Usually splendid snorkeling site
- Unseen danger for boaters
- Underwater knoll
- Tropical fish hangout
- Trim a sail
- The Florida Keys, essentially
- Submerged hazard
- Squirrelfish's habitat
- Spot for some schools
- Something for snorkelers to look at but not touch
- Snorkler's interest
- Snorkeling venue
- Snorkeling destination
- Site of a wreck
- Site of a shipwreck, perhaps
- Shorten, as a sail
- Shorten a sail
- Seaman's knot
- Sea-diving area
- Scubaing place
- Scuba spot
- Scuba site
- Sailor's peril
- Sailing danger
- Sail tuck
- Rocky ridge offshore
- Reduce, as a sail
- Pilot's hazard
- Part of a sail
- Old 97s "Barrier ___"
- Nemo's home
- Menace for mariners
- Mariner's hazard
- Marine peril
- Lagoon sight
- Lagoon perimeter
- Lagoon creator
- Key structure
- It's a great barrier
- It might be just below the surface
- Hesperus's undoing
- Hazardous obstruction
- Hazard near Norman's Woe
- Haven for sea life
- Great Barrier ____
- Great Barrier __
- Great Barrier e.g.
- Good snorkeling spot
- Feature of N.E. Australia
- Erosion by-product
- Diver's haunt
- Coral-viewing venue
- Coral-encrusted structure
- Coral strip
- Coral Sea hazard
- Coral product
- Coral line
- Coral growth
- Coral ecosystem
- Coral collection
- Coral --
- Bikini feature?
- Bikini feature
- Atoll, for one
- Atoll, essentially
- Atoll formation
- Atoll barrier
- Aquatic habitat
- "Won't somebody get me off of this ___" Sublime
- "Donovan's ___": 1963 film