A stunning deep-sea encounter has reignited curiosity about Earth’s most mysterious creatures. In newly resurfaced footage, an OceanX submarine comes face-to-face with a rare deep-sea creature—the bluntnose sixgill shark. This ancient predator has remained nearly unchanged for over 200 million years, surviving mass extinctions that wiped out the dinosaurs.
A Shark from Another Era and a Groundbreaking Study
The bluntnose sixgill shark, or Hexanchus griseus, is one of the ocean’s oldest surviving predators. Unlike most sharks, which have five gill slits, this species has six, a feature dating back to some of the earliest known sharks. These giants can grow up to 20 feet long, making them one of the largest deep-sea sharks in existence. Despite their size, they remain elusive, preferring depths of over 6,000 feet. Their nocturnal habits and preference for the deep make them difficult to study.
OceanX, a team dedicated to deep-sea exploration, set out to change that. Led by Dr. Dean Grubbs of Florida State University, researchers aimed to track this rare deep-sea creature without disturbing its environment. Traditional shark tagging methods often require bringing the animal to the surface, which can cause stress and alter its behavior. Instead, the team developed a way to attach a satellite tag while the shark remained in its natural habitat.
The footage captures the moment the massive shark approaches the submarine, swimming cautiously but confidently. The researchers inside, well-prepared for the encounter, seize the rare opportunity. They successfully attach the tag, marking a milestone in deep-sea research. The technology allows scientists to track the shark’s movements without disrupting its natural behavior.

By tracking this rare deep-sea creature, researchers gain valuable data about its migration patterns, feeding habits, and threats it faces. This knowledge can help conservationists develop strategies to protect not only sixgill sharks but also the entire deep-sea ecosystem.
Public interest in deep-sea exploration is also essential. The ocean remains one of Earth’s last unexplored frontiers, hiding species that have yet to be discovered. Advances in technology, like remote-operated submarines and satellite tracking, allow scientists to reach depths that were once impossible to study. Each encounter brings new discoveries that reshape our understanding of life on Earth.
A Future of Discovery and Conservation
This mission proved that deep-sea animals can be studied without removing them from their environment. Future research will build on this success, using similar techniques to tag and track other elusive species. As technology advances, scientists will be able to explore deeper and learn even more.