The Hidden World Beneath the Coral Sea
The Coral Sea off Queensland, renowned for its pristine waters and complex underwater topography. Photo: Tourism Queensland
This feature article originally appeared in AFLOAT Magazine and forms part of our latest edition of marine news exploring deep-sea discovery, ocean science and Australia’s remarkable Coral Sea frontier.
“There are more things in heaven and earth Horatio, than are dreamt of in your philosophy.” — Hamlet, Act 1, Scene 5.
Among the vast waterway are some fascinating newly discovered marine species, reports Bruce Stannard.
In the same week that America’s jubilant Artemis astronauts shared their amazing images of our lonely blue planet in the utter blackness of space, Australian scientists brought us revelations of another truly amazing breakthrough, much closer to home. In the hitherto unexplored depths of our own beautiful Coral Sea, they found more than 110 new-to-science species. Sailors have been navigating those same pellucid seas for centuries without suspecting that far below, on the deep sea floor, lies an incredible, undiscovered country, astonishingly rich in the diversity of its complex marine life. It was an awesome revelation. And yet, the news should not have come as a great surprise. After all, the world’s leading marine authorities have long agreed on one disconcerting fact. It’s this: although the oceans cover approximately seventy percent of the Earth’s surface and contain more life than anywhere else on the planet, human eyes have so far seen only 0.0001 per cent of the deep ocean floor. The stygian deep-ocean remains a mystery, making it less understood than the surface of our Moon or faraway Mars. Thus, this scientific breakthrough in our Coral Sea frontier represents a wonderful opportunity to address at least some of that ignorance.
As one who has sailed those tropical waters for 50 years, I was immediately interested in knowing more. The CSIRO’s marine scientists not only announced the discovery of more than 110 new-to-science fish and invertebrates; they went further, confidently estimating that number is likely to exceed 200 as more “cryptic species” are identified. Brought together by the CSIRO, (Australia’s national science agency) and the Nippon Foundation-Nekton Ocean Census, the taxonomists made their discoveries aboard the Research Vessel Investigator after scouring the mostly unexplored Coral Sea Marine Park at depths of between 200 to 3,000 metres. The Coral Sea Marine Park comprises nearly a million square kilometres of deep-water environments.
Catshark
The CSIRO’s Chief Scientist and shark expert, Dr Will White, identified four new species: two rays, one deep-water catshark and one chimera. “During the voyage,” Dr White said, “it was incredible to observe plenty of unique, deep-water creatures in locations from seamounts and atolls to unexplored deep reefs.” The new species were identified in a series of online workshops around Australia which were designed to help close knowledge gaps about undocumented marine life worldwide. To ensure high-quality data was visible to the global community in real-time, the taxonomists at the workshops input the species data directly into the Ocean Census Biodiversity Data Platform. This was the world’s first open-access digital gateway for newly discovered marine species. “During what were likely the largest taxonomic workshops on marine animals ever undertaken in Australia”, Dr White said, “other notable discoveries included species of brittlestars, crabs, sea anemones and sponges that are new to science.”
Onboard RV Investigator, the scientific team also observed a rich diversity of marine life in stunning new imagery from the ship’s deep-towed camera, including capturing footage of the rare sand tiger shark, a deep-water relative of the well-known grey nurse shark. “These incredible discoveries which were made possible by the impressive deep-water survey capabilities of the Investigator, reveal the extraordinary life in our oceans,” Dr White said. “They are crucial for protecting Australia’s marine biodiversity.”
This feature article originally appeared in July 2026 AFLOAT Magazine. To explore more stories like this, browse the AFLOAT Magazine archive or view the latest edition of AFLOAT Magazine.
