"It's the only wreck I've been around where you can snorkel on it and see what we see as divers, " Shaddox adds.
As divers searched the murky waters Friday, there was relief when one woman feared missing was found alive and well, the Hennepin County sheriff said.
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Also within the atoll-like reef system are picturesque islands that are mid-ocean pit stops for a variety of migrating seabirds, giving twitchers almost as much reason as divers to be excited about Apo Reef.
But before her most recent reincarnation as a divers' paradise, the historic vessel cruised the waves as a U.S. transport ship during World War II.
Over the weekend, search efforts intensified as boats, helicopters and divers scoured the area for any sign of the missing plane.
Eager divers watch in wonder as these five to six metre creatures swim stealthily around the shoal in search of breakfast, their distinctive tails cutting silently through the water.
Reports were sent in by bird watchers from across the Isle of Man and sightings included resident birds such as stonechats, robins and cormorants and winter visitors to the island such as twite, whooper swans and great northern divers.
As the sun rises over the horizon, the divers descend into the deep.
On Wednesday, officers using inflatable boats were checking waterways and river banks for clues as to the girls' whereabouts, and police divers were on stand-by.
Monad Shoal is classified as an intermediate dive, and most shops require divers to have advanced open water or deep dive certifications since the depth surpasses the normal 18m limit for open water divers.
"Currently, the Navy uses dolphins or divers feeling with their hands in such difficult conditions as near-shore bubbly water, for example in the Gulf, " he said.
Anything that damages the biodiversity of the reefs in diving resorts is bad for tourism, so in some countries, such as Mexico and Belize, people have tried introducing bounties payable to divers who catch lionfish.
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As a submarine rescue vessel, the Kittiwake was home to many Navy divers during its 49 years of service.
Some 20 of them were refloated to deeper water using inflatable pontoons as the water returned, but the remainder had died, the British Divers Marine Life Rescue (BDMLR) charity said.
In addition to their show of splashing around the surface of the water, the humpbacks enchant visitors as their cries echo below the water, conducting a beautiful symphony for divers used to listening to just the sound of their own breathing.
Today, advanced divers can get up close to the ruins with dive operators such as Big Blue and Zi Ao Diving Club, which run regular dives between April and November.
Divers can launch their own event or join an established one in locations as diverse as Thailand, Australia and Poland.
Animal rights in New Zealand remains a nearly intractable dilemma, given the economic divers, historic way of life for many, and a paradigm slow to shift, as in nearly every other country.
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