Deep-sea mollusk houses bacteria in tiny 'dragon balls,' revealing a new symbiotic structure

Researchers at The Hong Kong University of Science and Technology (HKUST) have discovered a previously unknown specialized organelle structure in a deep-sea mollusk living at cold seeps in the South China Sea. Dedicated to maintaining bacterial symbiosis, this newly identified survival mechanism provides new insights into how deep-sea organisms adapt to nearly oxygen-free environments and opens new directions for research on chemosymbiosis, organelle evolution and deep-sea ecosystems.