The Mediterranean mussel, Mytilus galloprovincialis, has established stable populations in the northern Caspian Sea, specifically within the waters adjacent to Russia's Astrakhan region. According to the Volga-Caspian branch of the All-Russian Research Institute of Fisheries and Oceanography (VNIRO), the invasive bivalve has bypassed the region's natural hydrochemical barriers, moving from sporadic sightings to a permanent presence.
Biologists p…
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