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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 CHFCoRp+uCMiVLTCNiilBfDwme+I2xoRswT4daoJekKi3lDnAJokdukBqsQ2k7DM
 epZwPfrNokTGMac2gJ1CRg==

<SEC-DOCUMENT>0001209191-07-063809.txt : 20071114
<SEC-HEADER>0001209191-07-063809.hdr.sgml : 20071114
<ACCEPTANCE-DATETIME>20071114155454
ACCESSION NUMBER:		0001209191-07-063809
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20071031
FILED AS OF DATE:		20071114
DATE AS OF CHANGE:		20071114

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			DYADIC INTERNATIONAL INC
		CENTRAL INDEX KEY:			0001213809
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL ORGANIC CHEMICALS [2860]
		IRS NUMBER:				450486747
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		140 INTRACOASTAL POINTE DRIVE
		STREET 2:		SUITE 404
		CITY:			JUPITER
		STATE:			FL
		ZIP:			33477
		BUSINESS PHONE:		561-743-8333

	MAIL ADDRESS:	
		STREET 1:		140 INTRACOASTAL POINTE DRIVE
		STREET 2:		SUITE 404
		CITY:			JUPITER
		STATE:			FL
		ZIP:			33477

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CCP WORLDWIDE INC
		DATE OF NAME CHANGE:	20030110

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Juda Nancy
		CENTRAL INDEX KEY:			0001418347

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32513
		FILM NUMBER:		071244572

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		323-935-3295

	MAIL ADDRESS:	
		STREET 1:		410 S LUCERNE BLVD
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90020

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Juda Tom
		CENTRAL INDEX KEY:			0001418358

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32513
		FILM NUMBER:		071244573

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		323-935-3295

	MAIL ADDRESS:	
		STREET 1:		410 S LUCERNE BLVD
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90020
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>doc3.xml
<DESCRIPTION>FORM 3 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2007-10-31</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001213809</issuerCik>
        <issuerName>DYADIC INTERNATIONAL INC</issuerName>
        <issuerTradingSymbol>DIL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001418358</rptOwnerCik>
            <rptOwnerName>Juda Tom</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>410 S. LUCERNE BOULEVARD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90020</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001418347</rptOwnerCik>
            <rptOwnerName>Juda Nancy</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>410 S. LUCERNE BOULEVARD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90020</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, par value $0.001 per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>395100</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F2"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>As trustee and beneficiary of The Tom and Nancy Juda Living Trust.</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The Reporting Person is filing this Form 3 with respect to that certain Voting Agreement dated as of October 31, 2007 of which The Tom and Nancy Juda Living Trust is a party (which was filed as an exhibit to the Schedule 13D filed on November 13, 2007 (the &quot;Schedule 13D&quot;)).  The Reporting Person may be deemed to have shared power to vote or to direct the vote of the shares of common stock (including shares of common stock issuable upon exercise or conversion of derivative securities exercisable or convertible within 60 days) which are the subject of such Voting Agreement (collectively, the &quot;Subject Shares&quot;).  The Subject Shares are described in the Schedule 13D.</footnote>
        <footnote id="F2">As trustees and beneficiaries of the Tom and Nancy Juda Living Trust, the Reporting Persons may be deemed to be the beneficial owner of the shares of common stock beneficially owned by those entities.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>By: /s/ Tom Juda
Tom Juda</signatureName>
        <signatureDate>2007-11-13</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Nancy Juda</signatureName>
        <signatureDate>2007-11-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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