Marenzelleria viridis (Verrill, 1873)
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Family:  Spionidae ()
Max. size: 
Environment:  benthic; brackish; marine; depth range 14 - 18 m
Distribution:  Atlantic Ocean and the Arctic.
Diagnosis:   
Biology:  Found in littoral and sublittoral sediments (Ref. 1314). An infaunal species in sandy substrate, commonly on Zostera sp. beds (Ref. 95819). In the Vainameri, north-eastern Baltic Sea, inhabits rocky, silty sand and clay sediment types (Ref. 95753), and under Furcellaria lumbricalis mats (Ref. 95891). An opportunistic species linked to the reduced survival of native benthic species in the Baltic Sea (Ref. 95891).
IUCN Red List Status: Not Evaluated (N.E.) Ref. 123251)
Threat to humans: 
Country info:  Introduced in the North Sea in 1983 and reintroduced in the Baltic Sea in 2004. Introduced as Merenzelleria neglecta Sikorski et Bick, 2004 in the Baltic Sea in 1985 and in the North Sea in 1996.

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