'Thriving' ecosystem found 30,000 feet undersea

What happened

A Chinese-led team of researchers exploring 9.5 kilometers (31,000 feet) below sea level in the northwest Pacific Ocean discovered "thriving communities" of tubeworms, mollusks and other creatures living in some of the ocean's deepest trenches, as reported Wednesday in the journal Nature. Traveling in a submersible called Fendouzhe for hours at a time, the international team covered 1,500 miles of the little-explored Kuril–Kamchatka and Aleutian trenches over 40 days last summer.

Who said what

It's "exciting" to "go to a place that human beings have not explored," study co-author Xiaotong Peng told the BBC. "And what we saw was quite amazing." The researchers photographed and filmed beds of clams and "dense clusters of tubeworms with tentacles tinged bloodred" being scaled by "iridescent snails" as "bristly, white creatures" wriggled between them "like rush-hour commuters," The Washington Post said. Some of them are believed to be unknown species.

The existence of these creatures, living in the frigid, pitch-black waters under high pressure, challenges "long-standing assumptions about life's potential at extreme depths," the authors said. They posited that the trench-dwelling invertebrates survived off the chemosynthesis of near-freezing methane and hydrogen sulfide seeping from the ocean floor.

What next?

Future studies will "focus on how these deep-sea creatures adapted to survive in such extreme conditions and how exactly they harness chemical reactions for food," The Associated Press said. "They must have some trick, or they must have some unique metabolic pathway, to adapt to the high pressure," said study co-author Mengran Du.

Subscribe to The Week

Escape your echo chamber. Get the facts behind the news, plus analysis from multiple perspectives.

SUBSCRIBE & SAVE

Sign up for The Week's Free Newsletters

From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.

From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.

Sign up