During warm summer nights when the full moon rises, some species of polychaetes swim up from the seafloor to spawn. It’s a perilous journey, because hungry jellyfish are waiting in the water column. This has now been documented for the first time.

When the option is to adapt or starve, animals are no stranger to getting scrappy in the face of climate change. Researchers conducted fieldwork in East Antarctica, where they revealed an underdocumented link in the food web of the Southern Ocean: Adélie penguins and their shelled pteropod consumption. Shelled pteropods, specifically Thecosomata, are a suborder of free-swimming sea snails. The study aimed to better understand Adélie penguin foraging behaviour and, in doing so, provided the first clear video evidence of Adélie penguins actively feeding upon shelled pteropods during their foraging sessions.

Mercury released into the oceans affects marine environments worldwide. Traditionally, its distribution and quantity have been estimated using marine biogeochemical simulation models. A recent international study led by Japanese researchers analyzed blood mercury concentrations in more than 11,215 seabirds from 108 species, of which 659 newly collected samples and over 10,556 from previous studies. This is the first biologically based estimate of oceanic mercury distribution.

As climate change intensifies harmful algal blooms worldwide, an international team led by Hiroshima University has developed a hybrid modeling approach that combines algal movement simulations, AI, and long-term monitoring data to sharpen forecasts of these bloom events—linked to environmental damage, mass fish die-offs, economic losses, and risks to human health.

This article highlights a "protection-pollution paradox" in no-take marine reserves (NTRs), where conservation-driven gains in fish biomass, body size, and trophic structure inadvertently increase the accumulation of legacy PCBs in apex predators. Climate change exacerbates this "toxic trap" by remobilizing sediment-bound contaminants and altering the toxicokinetics of marine organisms. To address this hidden threat, the authors advocate for an integrated management framework that combines climate-smart spatial planning, advanced biomonitoring, and targeted remediation. They emphasize shifting conservation metrics from simple biomass recovery to comprehensive ecosystem health to prevent NTRs from becoming inadvertent "toxic traps."

New study in Science Advances reveals that sinking land, not just rising oceans alone, will be the main cause of future coastal flooding along Indonesia’s most populous island. 

Penguins can serve as living monitors of their environment by using small, chemical-detecting leg bands, finds a study from UC Davis and University at Buffalo-SUNY

From seahorses to sharks, more than 3,000 fish species have been caught in bottom trawls, including many at risk of extinction, according to a new global inventory.