A research team from City University of Hong Kong (CityUHK) recently collaborated with an international research team to publish a study revealing a correlation between global contamination of per- and polyfluoroalkyl substances (PFAS) in globally consumed edible marine fish and associated human health risks.

The study found that consumers may be exposed to elevated levels of PFAS by consuming imported fish such as salmon, tuna, swordfish and cod — even in regions with low environmental pollution — thereby increasing food‑safety risks.

A research team from City University of Hong Kong (CityUHK) recently collaborated with an international research team to publish a study revealing a correlation between global contamination of per- and polyfluoroalkyl substances (PFAS) in globally consumed edible marine fish and associated human health risks.

The study found that consumers may be exposed to elevated levels of PFAS by consuming imported fish such as salmon, tuna, swordfish and cod — even in regions with low environmental pollution — thereby increasing food‑safety risks.

A research team led by Prof. QIAN Peiyuan, Chair Professor of the Department of Ocean Science at The Hong Kong University of Science and Technology (HKUST), in collaboration with the Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), and the Yellow Sea Fisheries Research Institute of the Chinese Academy of Fishery Sciences (CAFS), has achieved a significant breakthrough in understanding the adaptive strategies of the deep-sea black coral Bathypathes pseudoalternata (B. pseudoalternata) and its symbiotic microbiome. The study has been published in the top international journal Cell Host & Microbe.

The therapeutic use of human calcitonin (CT) in humans is limited by rapid receptor desensitization (tachyphylaxis), which requires short-term dosing despite the need for long-term treatment. In contrast, fish CT-CT receptors (CTR) exhibit extraordinary resistance to desensitization, enabling lifelong calcium regulation in high-Ca²⁺ marine environments. Here, we analyze the evolutionary, structural, and functional distinctions between fish and human CT systems. We propose that the unique molecular structure of fish CT and CTR may provide templates for engineering durable therapeutic agents to overcome tachyphylaxis.

Kyoto, Japan --  The species Orcinus orca, generally known as orcas or killer whales, is made up of many genetically distinct populations called ecotypes. Each ecotype indicates an ecological specialization with its own ecological and phylogenetic characteristics. The North Pacific is home to three known ecotypes of killer whales, called the transient, resident, and offshore ecotypes. While transient ecotype killer whales are mammal-eating, the resident and offshore orcas are fish-eating.

Though killer whale populations in the eastern North Pacific near Vancouver Island and Alaska have been studied extensively, populations in the western North Pacific have been less studied, especially around Hokkaido, Japan's northernmost island. One of these sea areas, Shiretoko, is the best in Japan to spot killer whales and is even home to a UNESCO natural World Heritage site, yet information on its killer whale population has remained limited. Researchers from Kyoto University and collaborating institutions worked together with a shared determination to change that.

"Clarifying the ecological characteristics of killer whales is crucial for achieving coexistence with them, as they are deeply entwined with human activities such as tourism and fisheries in Hokkaido," says first and corresponding author Momoka Suzuki.

A groundbreaking video from Kumamoto University's Center for Water Cycle, Marine Evironment and Disaster Management (Aitsu Marine Station) has been selected as one of "November's Best Science Images" by the scientific journal Nature. This special feature celebrates the most visually striking and scientifically innovative research images each month, and the selection is an incredible honor for Associate Professor. Yoshikawa and his team.

Members of the American Meteorological Society (AMS), the professional society for weather, water, and climate sciences and services, have elected Richard (Rick) Spinrad to the position of AMS president-elect for 2026, as well as electing five new council members: Marilyn Averill, Julie Demuth, Jordan Gerth, Maureen McCann, and Aaron Piña.

— This study introduces the concept of fishing fleets as "ecosystem sentinels," which are living sensors that indicate changing conditions in a natural habitat.

— Researchers found that near-real-time data from the global Vessel Monitoring System can detect climate-driven ecosystem disruptions, such as fish fleeing warming waters, much earlier than traditional indicators.

— Vessel-tracking data were six times more effective at predicting tuna distribution shifts than sea-surface temperature anomalies. Earlier detection could accelerate fishery management response time and avoid harm to local economies driven by commercial fishing.

A new study revealed that giant clam populations in American Sāmoa are far more stable and abundant than previously thought, demonstrating the effectiveness of traditional, community-based resource management. The research found that marine areas managed by local villages consistently support higher clam densities and larger clam sizes compared to federally designated no-take reserves.

A multinational scientific team led by UiT has uncovered the deepest known gas hydrate cold seep on the planet.  The discovery was made during the Ocean Census Arctic Deep – EXTREME24 expedition and reveals a previously unknown ecosystem thriving at 3,640 metres on the Molloy Ridge in the Greenland Sea. The groundbreaking findings regarding the Freya Hydrate Mounds, which hold scientific significance and implications for Arctic governance and sustainable development, have recently been published in Nature Communications.