Japanese Robot Discovers New Flatworm Species 6 Kilometers Deep in Pacific Ocean

Japanese scientists from the University of Tokyo and Hokkaido University have discovered a new species of flatworms living at a depth of approximately 6,200 meters in the Pacific Ocean. During a remote-controlled submarine expedition, marine researcher Yasunori Kano spotted mysterious black egg-like objects on the ocean floor and collected samples for laboratory analysis. Most samples were empty, but four intact egg cases contained flatworms, a finding confirmed by Kaichi Kakoi, a co-author of the study published in the journal Biology Letters.

Under microscopic examination, Kakoi identified the objects as egg capsules containing multiple flatworms, a discovery that surprised the researchers due to the extreme depth and conditions. DNA testing confirmed the flatworms represent a completely new species previously unknown to science. Despite living in one of the most extreme and dark environments on Earth, these deep-sea flatworms show only superficial similarities to their shallow-water relatives without significant evolutionary differences.

This discovery marks the deepest confirmed presence of free-living flatworms, surpassing the previous record of 5,200 meters, which was uncertain due to the organism's association with floating wood. The research highlights the complexity of life in the ocean's deepest layers, which cover over 70 percent of Earth's surface yet remain largely unexplored. It also demonstrates that complex life forms can reproduce and evolve independently under extreme pressure and total darkness, shedding new light on the mysterious ecosystems of the deep ocean.