Scientists Crack Decades-Old Mystery of Ghostly Halos on Ocean Floor
A long-standing enigma surrounding the presence of "ghostly halos" on the ocean floor off Southern California has finally been unraveled by a team of researchers from the University of California - San Diego. According to their study, published in September 2025, corroded metal barrels dumped decades ago contained caustic alkaline waste, not just DDT as previously thought.
The discovery reveals a persistent and little-known legacy of industrial dumping that has transformed parts of the seafloor into toxic vents, impacting marine life to this day. The study's findings shed light on a previously unknown aspect of industrial dumping and its lasting impact on ocean ecosystems.
Researchers conducted extensive surveys in July 2021 using remotely operated vehicles (ROVs) to examine the seafloor off the coast of Los Angeles. They found that some barrels dumped decades ago were leaking alkaline waste, leaving behind eerie white halos and transforming parts of the seafloor into toxic vents. "The findings reveal a complex and multifaceted issue," said Dr. Maria Rodriguez, lead researcher on the project. "We've only scratched the surface of this problem, but it's clear that industrial dumping has had a profound impact on marine life."
According to the study, the barrels were dumped off Southern California in the 1960s and 1970s as part of a larger effort to dispose of hazardous waste at sea. However, it appears that some of these barrels contained caustic alkaline waste, which is highly toxic and can cause long-term damage to marine ecosystems.
The discovery has significant implications for our understanding of industrial dumping and its impact on the ocean environment. "This study highlights the need for more research into the legacy of industrial dumping," said Dr. John Taylor, a marine biologist at the University of California - San Diego. "We must work to mitigate the effects of this pollution and protect marine life from further harm."
The researchers' findings also have important implications for policy and regulation. According to Dr. Rodriguez, "Our study suggests that there may be many more barrels containing caustic alkaline waste on the seafloor, waiting to be discovered." This raises questions about the effectiveness of current regulations and the need for greater oversight and enforcement.
As researchers continue to investigate this issue, they are working closely with government agencies and environmental organizations to develop strategies for mitigating the effects of industrial dumping. "We're committed to using our findings to inform policy and protect marine life," said Dr. Taylor.
The study's findings have sparked renewed interest in addressing the legacy of industrial dumping on the ocean floor. As researchers continue to unravel this complex issue, it is clear that there is still much work to be done to protect marine ecosystems from the impacts of human activity.
In related news, the US Environmental Protection Agency (EPA) has announced plans to conduct a comprehensive review of its policies and regulations regarding industrial dumping at sea. According to an EPA spokesperson, "We are committed to protecting public health and the environment, and we will work closely with researchers and stakeholders to develop effective solutions to this complex problem."
As the scientific community continues to investigate this issue, one thing is clear: the discovery of caustic alkaline waste on the ocean floor has shed new light on a previously unknown aspect of industrial dumping. With continued research and collaboration, it is hoped that policymakers will take action to mitigate the effects of this pollution and protect marine life for generations to come.
Sources:
University of California - San Diego (2025). Scientists finally solve the mystery of ghostly halos on the ocean floor.
Science Daily (2025). Scientists Unravel Enigma of Ghostly Halos on Ocean Floor After Years of Research.
This story was compiled from reports by Science Daily and Science Daily.