Six members of a pod of 30 belugas, a fifth of the whales that were transferred from a marine park in Canada to facilities in the U.S. and Spain as part of a massive rescue operation, have died in the last two months. They were transported to the facilities in July and August after languishing for more than a year at the Marineland theme park in Niagara Falls, Ontario, which closed to the public in 2025. These cetaceans were among the last to be held captive in Canada, after the country passed the Ending the Captivity of Whales and Dolphins Act in 2019. The law banned the keeping, breeding, and trading of cetaceans (whales, dolphins, and porpoises) for entertainment, affecting Marineland’s business model. After months of uncertainty over the animals’ future — including threats of euthanasia and an attempt to send them to an entertainment park in China — a consortium of aquariums under the U.S. Association of Zoos & Aquariums (AZA) devised the plan to transfer the 30 Marineland belugas. Sixteen went to SeaWorld facilities in California and Texas, 10 to Shedd Aquarium in Chicago, two to Georgia Aquarium in Atlanta, and two to Oceanogràfic València in Spain, which also took in four bottlenose dolphins. A captive beluga at SeaWorld San Diego. Image by Steven Snodgrass via Flickr (CC BY 2.0). On Aug. 26, Shedd Aquarium announced that Peekachu, a 23-year-old female beluga (Delphinapterus leucas) who had arrived at the facility on Aug. 13 and was blind in one…This article was originally published on Mongabay

Every 100 minutes, the U.S. state of Louisiana loses a soccer field’s worth of land to coastal erosion. It’s a natural process intensified by the acceleration of sea level rise and human activities like oil and gas extraction and alterations to the course of the Mississippi River. During the past century, the state lost 4,662 square kilometers (1,800 square miles) of land. Vanishing wetlands and altered estuaries make coastal communities, ecosystems and economies — including Louisiana’s $319 billion seafood industry — increasingly vulnerable to hurricanes, storms, and floods. The state has spent billions of dollars on restoration, including using offshore sand and river sediment to rebuild barrier islands and shorelines. But suitable sediment for these massive projects is in short supply. Since 2020, a New Orleans-based company called Glass Half Full has been testing a potential solution: Transforming used glass bottles into sand and gravel to construct small experimental islands and berms for coastal restoration projects. Before such projects can be scaled up, however, the effects of introducing these fill materials into the environment must be better understood. So Glass Half Full teamed up with Tulane University in New Orleans to create Project ReCoast, a five-year research project funded by the U.S. National Science Foundation that explores the use of sand made from recycled glass in coastal restoration. One of the resulting studies, published in the journal Restoration Ecology in April, found no significant differences in survival of several native estuarine animals exposed to recycled glass sand compared with other…This article was originally published on Mongabay

Demand for metals has exploded in recent decades, thanks to population growth, technological innovation, and economic development. The volume of metal ores like iron and copper extracted globally quadrupled during the last half-century, and the trillion-dollar industry shows no signs of slowing down. But the growing demand comes with environmental risks. Both metal mines and the storage facilities that hold vast amounts of toxic mining waste, known as tailings, can release pollution into the surrounding environment, contaminating land and water with heavy metals and harmful chemicals. This pollution can eventually wash downstream, affecting coastal communities and marine ecosystems. An analysis recently published in the journal Earth-Science Reviews warns that climate change could exacerbate the risks of metal mining pollution on marine environments. Researchers examined areas where compounding risks from warmer temperatures, rising seas, and changing weather patterns could release more toxic waste into the landscape over the next century, highlighting the need for remediation and monitoring. They identified the six regions where overlapping hazards pose the highest risk: North America, South America, Northern Europe, the Mediterranean, East Asia, and Australia. “We isolate six hotspots, but that makes up a large part of the world,” study lead author Adam Sproson, a research scientist at the National Oceanography Centre in the U.K., told Mongabay. “There’s quite a lot of coastline to cover.” The coastal Levant Mine in Cornwall, U.K., in 2008. This tin and copper mine operated from the 18th century until the 1930s, and its workings extended under the sea. Legacy…This article was originally published on Mongabay

Seabird protections drew debate at the annual meeting of the Commission for the Conservation of Southern Bluefin Tuna (CCSBT), held Oct. 5-8 in Brussels. The eight-member multilateral body that manages the stock has long struggled to curb seabird deaths caused by longline fishing targeting southern bluefin tuna (Thunnus maccoyii) across several oceans. This year’s meeting saw a modicum of progress on the issue. Based on recent modeling, the parties agreed on 13 priority seabird species for conservation efforts and designated high-risk areas for them. However, the designations don’t carry any new mandatory protections: Due to the reluctance of some members, the commission stopped short of adopting proposed conservation measures for the high-risk areas, most notably tighter seabird bycatch mitigation requirements. Oliver Yates, head of the marine program at BirdLife International, a U.K.-based NGO, told Mongabay that the identification of high-risk areas was “a good step forward” but said it was a problem that “they’ve not then adopted any management action to accompany the fishing activity in those spatial areas.” “[T]hey recognise bycatch of seabirds is a very serious issue but again agreed to do nothing about it,” Yates, who attended the Brussels meeting, added in a text message. There are more than a dozen RFMOs in the world, with some overlapping geographically but managing different fish stocks. The map shows the five best-known and most commercially important RFMOs, which focus on tuna and tuna-like species. Image courtesy of Pew Charitable Trusts. Sources: U.N. Food and Agriculture Organization, FAO Map Catalog.…This article was originally published on Mongabay

After decades of losses, new data show the world’s mangrove forests are beginning to rebound. It marks a modest but significant turnaround for the salt-tolerant coastal trees and shrubs, which provide vital ecosystem services, including carbon storage, habitat for thousands of species and protection from storms and erosion. Global mangrove cover increased by 477 square kilometers (184 square miles) between 1985 and 2025, according to the latest Global Mangrove Watch (GMW) data released in July. Restoration and stronger protections drove the modest net gains, which represent a 0.3% increase over four decades. The new assessment follows a separate study, published in June, that reached a similar conclusion about overall growth in mangrove cover. GMW, a mapping initiative of the NGO consortium known as the Global Mangrove Alliance, has tracked mangrove gains and losses since 2011. In this third update, researchers used 10-meter (33-foot) resolution satellite imagery and machine learning to map changes in mangrove cover across 108 countries. It’s the first of the updates to span a 39-year period, from 1985 to 2024, according to Lammert Hilarides, the GMW program lead at the Netherlands-based NGO Wetlands International. The previous version only tracked changes in the data since 1996, covering about 24 years. “The importance of tracking changes in mangroves lies in the need to have accurate information if you want to successfully halt loss, protect and restore mangroves,” Hilarides told Mongabay by email. He added that the new data show significant differences between regions, countries and the timing of gains…This article was originally published on Mongabay

Paul Spong’s life has been entwined with whales for nearly six decades. In the 1960s, Spong, who hails from Aotearoa New Zealand, moved to the U.S. to study physiological psychology at the Brain Research Institute at the University of California, Los Angeles. Then, in 1967, he entered the world of cetaceans when the Vancouver Aquarium in Canada hired him to study the behavior of a once-wild orca (Orcinus orca) named Skana, who’d been captured from Puget Sound that same year. While conducting behavioral, visual and auditory experiments on Skana, Spong quickly noticed the orca’s high intelligence and self-awareness, and advocated for her release. But the aquarium, which didn’t renew Spong’s contract, held onto Skana until her death in 1980. After his experience with Skana, Spong decided to investigate orcas in their natural habitat. In 1970, he landed on Hanson Island, off the northeastern coast of Vancouver Island, in British Columbia, Canada, with a tent and hydrophone, intending to study the local whales over the Northern Hemisphere summer. But his project stretched out longer than a single season, and by the late 1970s, Spong had founded a permanent research facility on Hanson Island, known today as the OrcaLab. Spong and his wife, whale researcher Helena Symonds, now serve as co-directors of the organization. Northern resident orcas near Hanson Island in British Columbia. Image courtesy of OrcaLab. Spong and Symonds made a conscious decision to take a hands-off approach, only observing the orcas using land-based hydrophones and cameras, rather than tracking them…This article was originally published on Mongabay

As a heat wave settled on the Red Sea in 2022, a patch of corals in a reef 15 kilometers (9.3 miles) off the coast of Saudi Arabia reacted differently than other corals. They’d been treated with probiotics, beneficial bacteria isolated from healthy corals, and those treatments prevented the corals from bleaching, scientists now report. Corals provide habitat for about one-third of marine species but are declining at an unprecedented rate, according to the latest report from the Global Coral Reef Monitoring Network. Rising temperatures lead to coral bleaching, a breakdown of the beneficial symbiosis between corals and algae that can result in coral death. Scientists estimate that if global temperatures rise by 1.5°Celsius (2.7°Fahrenheit) above pre-industrial levels, 70-90% of corals will be at risk of severe degradation worldwide by 2100. “Corals can acclimate and adapt, but only if they are alive,” principal investigator of the new study Raquel Peixoto, a microbial ecologist at the King Abdullah University of Science and Technology (KAUST) in Saudi Arabia, told Mongabay in a video call. She and other researchers around the world are investigating how manipulating the microscopic bacteria that live on corals can help them respond to threats ranging from oil spills to infectious disease. Though Peixoto previously showed that probiotics could stave off bleaching and keep corals alive in tanks, the new results, published Sept. 3 in Cell Reports, are the first to indicate that probiotics may help protect corals in the wild from marine heat waves. “It’s one thing to…This article was originally published on Mongabay

Between 2014 and 2015, a marine heatwave known as “The Blob” warmed an area of the Pacific Ocean larger than the United States and Mexico combined. The massive event fueled toxic algae blooms, collapsed fisheries, killed off millions of emaciated seabirds, sent dead fin whales (Balaenoptera physalus) and sea otters washing up on Alaska and British Columbia coasts, and dotted California shores with starving sea lions. Though best known as a marine heat wave, The Blob was also an extreme acidification event. Yet occurrences of these compound heat-acidity extreme events remain poorly understood. A new study, published in the journal AGU Advances in August, provides a detailed look at the frequency, intensity and duration of these compound events during the last four decades. The study reveals an understudied aspect of marine heat waves that could have implications for the developing 2026-2027 “super” El Niño, in which waters in the equatorial Pacific become unusually warm due to changing wind patterns. An underweight sea lion pup on a beach in February 2015. Image by NOAA Fisheries West Coast. Researchers from the Swiss Federal Institute of Technology (ETH Zurich) found compound heat-acidity events across the globe happen together “more frequently than would be expected by chance,” they wrote. Instead, the researchers attributed their occurrence to underlying ocean physics that allow marine heat waves to become unusually acidic in some regions. These events are mostly short-lived and small, with 67% of the 500 identified events lasting less than three months and extending to an…This article was originally published on Mongabay