The Kuril–Kamchatka Trench or Kuril Trench is an oceanic trench in the northwest Pacific Ocean. It lies off the southeast coast of Kamchatka and parallels the Kuril Island chain to meet the Japan Trench east of Hokkaido. From Wikipedia
The Nature paper confirms submersible dives uncovered thriving chemosynthesis-based communities at record depths, prompting investigations into their adaptations and prevalence worldwide.