Volunteer divers have recorded what researchers believe is the first footage of a great white shark filmed underwater in the Mediterranean, captured during a ghost net removal dive near a shipwreck in the Strait of Sicily.

Derk Remmers, a technical diver with Ghost Diving, was about 40 meters (131 feet) below the surface between Sicily and Tunisia when the shark appeared. He filmed the encounter. The footage and photographs were released on June 8 to mark World Oceans Day.

Remmers said that the odds of meeting such an animal underwater are far lower than winning the lottery, and that his hands were shaking as he filmed.

The shark circled the group, then turned and moved back toward the divers. Remmers said that its behavior appeared calm and curious, not aggressive. When the team released air from their regulators, the shark picked up speed and disappeared from view.

First great white shark sighting in the Mediterranean stuns researchers

Marine biologists who reviewed the footage called the sighting rare and scientifically significant.

Dr. Carlo Cattano, a researcher at the Sicily Marine Centre of the Stazione Zoologica Anton Dohrn, said that most knowledge of great white sharks in the region has come from dead animals caught accidentally in fishing nets, and that direct observations help researchers better understand the species.

A great white shark circled divers in the Mediterranean as they worked to pull deadly ghost nets from a shipwreck in the Strait of Sicily. pic.twitter.com/tdJKJ37TMY

— Tom Marvolo Riddle (@tom_riddle2025) June 9, 2026

He said that prior research had already identified the area as a key location for threatened species and that this sighting reinforces its conservation value. Researchers cautioned that broader conclusions would require further study.

The mission was organized by the Healthy Seas Foundation, along with Ghost Diving and the Society for the Documentation of Submerged Sites. The wreck’s location is being kept confidential.

Ghost nets, fishing gear lost or abandoned at sea, continue killing marine life long after leaving a vessel. Previous dives at the site documented loggerhead sea turtles and large fish species caught in the gear.

Shipwrecks attract marine life, and when ghost nets settle on them, those structures become underwater traps.

Ghost nets turn shipwreck ecosystems into ongoing ocean traps

Veronika Mikos, director of Healthy Seas, said that the sighting is a reminder of how much marine life still exists in offshore Mediterranean waters and how much is at risk from discarded gear and overfishing.

Remmers said that between 1% and 10% of all fishing gear worldwide is lost each year, possibly adding more than 500,000 metric tons of abandoned nets to the ocean annually.

He said that the shark’s presence near the wreck signals an abundance of prey, and that those same animals face entanglement risk. Volunteer cleanups alone cannot resolve the problem, he said, and stronger action against industrial and illegal fishing is needed.

The mission also included environmental DNA sampling and underwater monitoring. Healthy Seas said that it plans to release additional footage and scientific material in the coming weeks.

PORT HUGHES, Australia — Situated midway along the Great Southern Reef that spans Australia’s southern coastline, the waters off Port Hughes typically teem with life. The coastal hamlet northwest of Adelaide plays host to a multitude of coral, bivalve and fish species. But in late March, the largest and longest harmful algal bloom (HAB) in Australian history arrived to Port Hughes, depleting its waters’ rich biodiversity. The bloom had first appeared elsewhere off the state of South Australia’s coast a year earlier, causing eye and skin irritation and respiratory symptoms among beachgoers. Then, along with waves of acrid-smelling sea foam, scores of dead marine animals began washing ashore. In Port Hughes, the HAB’s impacts were most visible below the surface. The town’s wooden jetty had previously been one of the most consistent locations in South Australia to observe temperate species, said Stefan Andrews, co-founder of the Great Southern Reef Foundation, a conservation advocacy group. But by mid-April, when Mongabay joined Andrews on a dive, the site was drab compared with vibrant photographs taken in February and March. Under the jetty, sponges and corals that had previously adorned its pylons in a brilliantly hued mosaic appeared colorless. Apart from a short-headed seahorse (Hippocampus breviceps) — a “sign of hope,” Andrews called it — little life was visible in the murky waters. The reef, he said, had become quieter, lacking the sounds of snapping shrimp and other creatures that once played in the underwater soundtrack. “There’s a sense of loss when you…This article was originally published on Mongabay