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Scientists Describe First Stony Coral Found Growing on Pacific Manganese Nodules

Deltocyathus zoemetallicus, recorded beyond 4,000 meters in the Clarion-Clipperton Zone, depends on nodules targeted by deep-sea mining.

Overview

  • The species is formally described in the Zoological Journal of the Linnean Society, marking a newly recognized deep-sea habitat specialization.
  • Researchers collected coral specimens and manganese nodules during multiple expeditions aboard two research vessels.
  • The coral lacks symbiotic algae, feeds on drifting particles, and some samples came from depths where calcium carbonate begins to dissolve.
  • Scientists warn that removing nodules for mining could eliminate the species because its exclusive substrate would vanish.
  • Findings place the coral in the Clarion-Clipperton Zone between Hawaii and Mexico at depths greater than 4,000 meters, an area rich in slow-growing, metal-laden nodules.