A survey of more than 60 fishing communities found no confirmed sightings of the mammal, which has lived in Chinese waters for hundreds of years.

What is likely a single-mast cargo ship sits in a predominantly saltwater stretch of the river Trave and was first spotted by sonar in 2020.

New discoveries are appearing in the wake of melting mountain ice, shrinking lakes and falling water levels.

The Ocean Voyages Institute retrieved 211,644 pounds of discarded fishing gear, consumer plastics and other waste—some of which had been floating for decades.

Sixteen new stamps feature the waters and wildlife protected by the National Marine Sanctuary System, including a pufferfish and sand tiger shark.

Sunk in 2019, the old Lockheed Martin L1011 Tristar airplane has become an artificial reef and a world-class dive site.

The Mexican government has invoked its national security powers to push forward the construction of a tourist train being built the Caribbean coast, threatening its cave systems.

In partnership with the marine exploration nonprofit OceanX, University of Miami scientists using ROVs discovered the massive brine pools more than a mile deep.

Researchers are racing to complete digitization of ancient cave art in a submerged Mediterranean cavern as rising sea levels and plastic pollution threaten to scrub them from the annals of history.