Marine discovery in Australia: More than a hundred new species discovered

A deep-sea research expedition in northeastern Australian waters has led to the identification of more than 110 new marine species in the Coral Sea, one of the least explored ocean ecosystems on Earth.

The discovery was announced by Australia’s public science agency, CSIRO, which emphasized the importance of these findings for expanding our understanding of marine biodiversity.

The research was carried out in late 2025 aboard the research vessel RV Investigator, which surveyed areas ranging from about 650 feet to nearly 9,850 feet deep within the Coral Sea Marine Park. Covering roughly 386,000 square miles, this protected area remains largely unexplored by science.

According to preliminary analyses, researchers have identified more than 100 species of fish and invertebrates that had never before been documented. Experts estimate that the total could surpass 200 as more complex or harder-to-classify organisms are studied.

An ecosystem still waiting to be fully discovered

Among the species identified are new varieties of rays, deepwater sharks, and chimaeras, along with several invertebrates such as brittle stars, crabs, sea anemones, and sponges. Scientists noted that many of these organisms inhabit hard-to-reach environments, including seamounts, atolls, and remote reefs.

During the expedition, researchers also captured never-before-seen images of these ecosystems using deep-sea cameras, including sightings of rarely observed species such as the sand tiger shark.

The data collected have been added to open scientific platforms to make them accessible to researchers around the world. In addition, the samples gathered during the expedition will be studied in detail in scientific collections over the coming years.

Scientists say these discoveries are essential for strengthening protections for deep-ocean ecosystems. At a time of growing pressure on the world’s oceans, understanding the biodiversity that exists there is critical for developing effective and sustainable conservation strategies.

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