Submarine canyons are among the most spectacular and fascinating geological formations to be found on our ocean floors, but at an international level scientists have yet to uncover many of their secrets, especially of those located in remote regions of the Earth like the North and South Poles. Now, an article published in the journal Marine Geology has brought together the most detailed catalogue to date of Antarctic submarine canyons, identifying a total of 332 canyon networks that in some cases reach depths of over 4,000 metres.

A team of scientists from the IBS Center for Climate Physics (ICCP), Pusan National University in South Korea and the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI), Bremerhaven, Germany has achieved an important breakthrough in climate modeling, providing unprecedented insights into Earth's future climate and its variability. Their research was published in the open access journal Earth System Dynamics.

Currents can affect marine animals’ locomotion, energy expenditure and ability to navigate; the force of currents may cause them to drift off-course of their intended trajectory. A study published July 17^th in the open-access journal PLOS Biology by Richard Michael Gunner at the Max-Planck-Institut für Verhaltensbiologie, Germany, suggests that Magellanic penguins can sense current drift and maximize navigation efficiency by alternating between traveling in a direct route in calm conditions and swimming with the flow of strong currents allowing them to conserve energy while navigating toward their colony.

How is ventilation at various depth layers of the Atlantic connected and what role do changes in ocean circulation play? Researchers from Bremen, Kiel and Edinburgh have pursued this question and their study has been published in the professional journal Nature Communications.

Amphidromous fish – which migrate between freshwater streams and the sea – can move between habitats thanks to ocean currents. Since island streams are generally small and vulnerable to human impact, understanding how exactly fish populations are connected between streams and between islands is important for the conservation of geographically isolated species. In a study now published in Scientific Reports, a team of researchers from the Okinawa Institute of Science and Technology (OIST) and collaborators sought to understand these dynamics by investigating the genetic connectivity among populations of the amphidromous goby Luciogobius ryukyuensis at four islands in the Ryukyu Archipelago in Japan: Okinawa, Kume, Ishigaki, and Iriomote. 

What’s the driving factor behind nemo’s evolutionary diversification, and why does this matter? Anemonefish are one of the few examples of adaptive radiation in marine environments — where species rapidly diversify to fill ecological roles. Understanding how this happens can teach us how biodiversity forms and is maintained, especially under changing environmental pressures.

Scientists have long assumed that anemonefishes’ tight-knit relationship with sea anemones, their protective hosts, was the main engine behind their evolutionary diversification. Our study instead shows that distinct ecological lifestyles also shape how different species evolve. Some species are “adventurers” that roam widely with powerful muscles and low energy costs, while others are “homebodies” that stay close to their anemone, have smaller muscles, and use more energy to swim.

This matters because it underscores how different behaviors and physiological traits influence biodiversity. In a time of rapid environmental change, understanding these hidden dimensions of animal adaptation helps us better predict which species may be more resilient or vulnerable.

Now, a team of researchers has found that some corals survive warming ocean temperatures by passing heat-resisting abilities on to their offspring. 

The findings, published in the journal Nature Communications, are the result of a collaboration between Michigan State University, Duke University and the Hawaiʻi Institute of Marine Biology, or HIMB, at the University of Hawaiʻi at Mānoa. This work, funded by the National Science Foundation and a Michigan State University Climate Change Research grant, is crucial in the race to better conserve and restore threatened reefs across the globe. 

South China Sea marine heatwaves split into two types, with ocean dynamics playing a surprising role