A new research study found that well-managed fisheries can support the recovery of large marine predators such as seals and porpoises, showing that conservation and sustainable seafood production can go hand in hand.

New University of Hawaiʻi research confirms that “Sharktober” is real, revealing a statistically significant spike in shark bite incidents in Hawaiian waters every October. The study, which analyzed 30 years of data (1995–2024), found that about 20% of all recorded bites occurred in that single month, a frequency far exceeding any other time of the year. Researchers at UH Mānoa’s Hawai‘i Institute of Marine Biology (HIMB) Shark Lab published their findings in Frontiers in Marine Science.

An AI-driven study using a massive global fossil dataset shows the asteroid that killed the dinosaurs caused only a small (~10%) drop in shark and ray species, while they were already diverse long before the impact. Their diversity actually peaked about 50 million years ago, but has since declined by over 40%, leaving today’s oceans far less diverse.

Scientists have solved a 66 million year old mystery about why the earth cooled after the age of the dinosaurs.

A new study from UC San Diego’s Scripps Institution of Oceanography finds that marine microbes had mostly positive interactions with one another during a six-year study. These positive interactions became even more common during times of environmental stress. 

New species of plankton appeared fewer than 2,000 years after the world-altering event, according to research led by scientists at The University of Texas at Austin and published in Geology.  

A new study led by former Syracuse University doctoral student Ruliang He and co-authored by his advisor, Earth and environmental sciences Professor Zunli Lu, reveals that Earth's ancient tropical oceans were fundamentally different from today's. The research, recently published in Nature Geoscience, shows marine oxygen levels were higher near the equator than at the middle latitudes during the Proterozoic Eon, which began 2.5 billion years ago and ended 539 million years ago. 

During the last ice age, the Atlantic Ocean’s powerful current system remained active and continued to transport warm, salty water from the tropics to the North Atlantic despite extensive ice cover across much of the Northern Hemisphere, finds new research led by UCL scientists.

As striking and fascinating as beluga whales are, we know surprisingly little about them. Their cold, remote, and often frozen Arctic habitat makes them very hard to study. But now scientists have collected hundreds of DNA samples from one Alaska population to reveal crucial information about mate choice and reproductive strategies. The team expected to find that a few highly successful beluga males fathered most calves, but instead it seems that both males and females choose many different partners to reproduce with over the years. Scientists believe this mate switching could be saving the small, isolated population from inbreeding.