-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 URMcXZSwW1m453F5BYbmhP/B76QlvSAEWLx6bZFbiOiOXnx0GxAgCGCt6RuH0tQt
 5B+iVLrWJRm4GS+25k+s8Q==

<SEC-DOCUMENT>0001209191-10-039490.txt : 20100723
<SEC-HEADER>0001209191-10-039490.hdr.sgml : 20100723
<ACCEPTANCE-DATETIME>20100723143602
ACCESSION NUMBER:		0001209191-10-039490
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100721
FILED AS OF DATE:		20100723
DATE AS OF CHANGE:		20100723

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SESSLER GREGORY
		CENTRAL INDEX KEY:			0001285810

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-13789
		FILM NUMBER:		10967110

	MAIL ADDRESS:	
		STREET 1:		9011 N.E. 34TH ST
		CITY:			BELLEVUE
		STATE:			WA
		ZIP:			98004

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Marina Biotech, Inc.
		CENTRAL INDEX KEY:			0000737207
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				112658569
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		3830 MONTE VILLA PARKWAY
		CITY:			BOTHELL
		STATE:			WA
		ZIP:			98021
		BUSINESS PHONE:		4259083600

	MAIL ADDRESS:	
		STREET 1:		3830 MONTE VILLA PARKWAY
		CITY:			BOTHELL
		STATE:			WA
		ZIP:			98021

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MDRNA, Inc.
		DATE OF NAME CHANGE:	20080610

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NASTECH PHARMACEUTICAL CO INC
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-07-21</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000737207</issuerCik>
        <issuerName>Marina Biotech, Inc.</issuerName>
        <issuerTradingSymbol>MRNA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001285810</rptOwnerCik>
            <rptOwnerName>SESSLER GREGORY</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3830 MONTE VILLA PARKWAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOTHELL</rptOwnerCity>
            <rptOwnerState>WA</rptOwnerState>
            <rptOwnerZipCode>98021</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Marina Biotech, Inc. Common Stock Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>2.9824</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2010-07-21</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2010-07-21</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>12938</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.9824</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2020-07-21</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>12938</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>12938</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">On July 21, 2010 the reporting person was granted options to purchase 12,938 shares of common stock of MDRNA, Inc.  The options have a term of ten years beginning on July 21, 2010 and vest on July 21, 2011.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/Peter S. Garcia
Attorney in Fact</signatureName>
        <signatureDate>2010-07-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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