Vent molluscs make up less than 1% of global mollusc species.
Notes on verification
Confirmed via multiple outlets citing IUCN/Reuters data on 201 known vent-endemic mollusc species against a total described mollusc diversity of ~50,000-85,000+, consistently yielding under 1%. Though many sources trace to one Reuters story, the underlying math is independently verifiable via mollusc biodiversity literature. [cascade flags: wikipedia_dropped_other_sources_exist | tier=bronze indep_score=0.525 clusters=5 claim_tier=notable | framework convergence=partial on IUCN Red List vent mollusc assessment (201 species) compared against general mollusc taxonomic diversity estimates (~50,000-120,000 species) (upstreams: IUCN Red List of Threatened Species (2026 update), Thomas et al. 2021 'A Global Red List for Hydrothermal Vent Molluscs' (Frontiers in Marine Science), Chapman 2009 mollusc species estimate) — publishers independent, evidence may not be | kind=empirical eligibility=high]
Sources
- IUCN Warns Seabed Mining Threatens Rare Molluscs | MarineBio (seed:animals_and_wildlife)
- https://www.mining.com/deep-sea-mining-threatens-60-of-vent-species-iucn/ (corroboration)
- https://www.miningmx.com/news/markets/65862-deep-sea-mining-threatens-rare-molluscs/ (corroboration)
- https://www.marinetechnologynews.com/news/mollusks-threatened-mining-efforts-664161 (corroboration)
- https://www.bairdmaritime.com/offshore/undersea-mining/seabed-mining-risks-vent-mollusc-extinction-activist-group-claims (corroboration)
- https://www.researchgate.net/publication/266200500_A_New_Critical_Estimate_of_Named_Species-Level_Diversity_of_the_Recent_Mollusca (corroboration)