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The now nearly extinct sturgeon population in the [[Baltic Sea]] belongs to the Atlantic sturgeon subspecies rather than to the European variant (''A. sturio'') as had been thought. This species migrated to the Baltic about 1300 years ago and displaced the native species.<ref>{{cite journal | pmc=2527320| author1=Ludwig| first1=A| title=Tracing the first steps of American sturgeon pioneers in Europe| journal=BMC Evolutionary Biology| volume=8| pages=221| last2=Arndt| first2=U| last3=Lippold| first3=S| last4=Benecke| first4=N| last5=Debus| first5=L| last6=King| first6=T. L.| last7=Matsumura| first7=S| doi=10.1186/1471-2148-8-221| pmid=18664258| year=2008}}</ref>
The last known specimen of the Atlantic sturgeon in the Baltic region was caught in 1996 near [[Muhumaa]] in [[Estonia]]. It was 2.9 m long, weighed 136 kg, and was estimated to be about 50 years old.<ref>[http://www.saarlane.ee/uudised/uudis.asp?newsid=25986&kat=1 "Muhu Maria jäi viimaseks Läänemerest püütud atlandi tuuraks".] {{wayback|url=http://www.saarlane.ee/uudised/uudis.asp?newsid=25986&kat=1 |date=20131017001706 }} ''Saarlane.ee''. {{et icon}}</ref>
A German-Polish project was underway in 2009 to reintroduce the sturgeon into the Baltic by releasing specimens caught in the Canadian [[Saint John River (New Brunswick)|Saint John River]] into the [[Oder]], a river at the border between Germany and Poland where the species once spawned.<ref>http://www.spiegel.de/international/0,1518,445158,00.html</ref> The project expanded in 2013 to include Estonia, where one-year old juveniles were released into the [[Narva River]].<ref>[http://maaleht.delfi.ee/news/maaleht/uudised/eesti-meres-ujuvad-taas-tuurad?id=66919990 "Eesti meres ujuvad taas tuurad".] ''[[Maaleht]]'' 18. October 2013. {{et icon}}</ref>
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{{refbegin}}
*[http://www.dec.ny.gov/animals/7025.html New York State Department of Environmental Conservation - New York's Sturgeon]
*https://web.archive.org/web/20060213083257/http://dep.state.ct.us:80/burnatr/wildlife/factshts/atsturg.htm
*https://web.archive.org/web/20060508224855/http://www.maine.gov:80/dmr/recreational/fishes/sturgeon.htm
*{{FishBase subspecies | genus = Acipenser | species = oxyrinchus | subspecies = oxyrinchus | year = 2008 | month = October}}
*Burroughs, Frank [August 2006]. Confluence: Merrymeeting Bay. Gardiner, Maine: Tilbury House, 21-28. ISBN 978-0-88448-282-6.
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