"Underwater noise from ships has gotten louder, reshaping marine ecosystems and the lives of animals that depend on sounds to eat, mate, and navigate. Can ships ever pipe down?"

"Unregulated tankers sidestepping Western sanctions are posing a bigger risk to the Mediterranean region and Greece is undertaking more protective measures to safeguard its coast, the country's shipping minister told Reuters on Tuesday."

"Florida’s coral reefs experienced the deadliest bleaching event in history last summer, a toll largely caused by record hot coastal waters. Now, water temperatures in the Florida Keys are already approaching the coral danger zone — earlier and hotter than last year."

"Half of the world's mangrove ecosystems, with trees whose roots stretch down into brackish water, are at risk of collapse. That's according to the first assessment from the International Union for Conservation of Nature, a leading scientific authority on the status of species and ecosystems. The new report finds that sea level rise fueled by climate change is the biggest risk."

"Migratory fish populations have crashed by more than 80% since 1970, new findings show." "‘Catastrophic’ global decline due to dams, mining, diverting water and pollution threatens humans and ecosystems, study warns".

"A campaign to add 10 billion oysters to the bay by 2025 — naturally purifying the water — is on pace even as Virginia and Maryland contend with agricultural runoff and other pollutants."

"California’s contentious and long-debated plan to replumb the Sacramento-San Joaquin Delta and pump more water south finally has a price tag: about $20 billion."

"Ocean temperatures that have gone “crazy haywire” hot, especially in the Atlantic, are close to making the current global coral bleaching event the worst in history. It’s so bad that scientists are hoping for a few hurricanes to cool things off."

"The El Nino weather pattern should fade out by June but could be replaced by the La Nina phenomenon by the second half of the year, a U.S. government forecaster said on Thursday."

"Scores of emaciated brown pelicans, too weak to fly, have been found on Southern California beaches in the last month and taken to an Orange County rescue center, according to its director."