<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-07-30</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001316016</issuerCik>
        <issuerName>AQUANTIA CORP</issuerName>
        <issuerTradingSymbol>AQ</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001721262</rptOwnerCik>
            <rptOwnerName>Pelowski Ken</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1600 EL CAMINO REAL, SUITE 250</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MENLO PARK</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94025</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2018-07-30</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>64655</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.28</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>354260</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2018-07-30</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>44944</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>13.35</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>309316</value>
                    <footnoteId id="F4"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>8528</value>
                    <footnoteId id="F5"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Common Stock Warrant (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>9.28</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2018-07-30</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>64655</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2013-04-05</value>
            </exerciseDate>
            <expirationDate>
                <value>2023-04-05</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>64655</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">On July 30, 2018, Pinnacle Ventures II Equity Holdings, L.L.C. (&quot;PVIIEH&quot;) exercised a warrant to purchase a total of 64,655 shares of the Issuer's common stock for $9.28 per share. PVIIEH paid the exercise price on a cashless basis, resulting in the Issuer's withholding of 44,944 of the warrant shares to pay the exercise price and issuing to PVIIEH the remaining 19,711 shares. The general partner of PVIIEH is Pinnacle Ventures Management II, L.L.C. (&quot;PVMII&quot;).  Mr. Pelowski is a controlling managing member of PVMII. Mr. Pelowski disclaims beneficial ownership of all such shares except to the extent of any pecuniary interest therein.</footnote>
        <footnote id="F2">Represents 64,655 shares held by PVIIEH, 60,703 shares held by Pinnacle Ventures Management I, L.L.C. (&quot;PVMI&quot;), 142,624 shares held by Pinnacle Ventures Management II, L.L.C. (&quot;PVMII&quot;), 14,225 shares held by Pinnacle Ventures Equity Management I, L.L.C. (&quot;PVEMI&quot;) and 72,053 shares held by the Pelowski/Mirek Living Trust (the &quot;Trust&quot;). Mr. Pelowski disclaims beneficial ownership of all such shares except to the extent of any pecuniary interest therein.</footnote>
        <footnote id="F3">Mr. Pelowski is a controlling managing member of PVMI, PVMII and PVEMI (together with PVIIEH, the &quot;Pinnacle Entities&quot;) and, as such, is deemed to have sole voting and dispositive power with respect to the shares held by the Pinnacle Entities. Mr. Pelowski is a co-trustee of the Trust and may be deemed to share voting and dispositive power over the shares held by the Trust.</footnote>
        <footnote id="F4">Represents 19,711 shares held by PVIIEH, 60,703 shares held by PVMI, 142,624 shares held by PVMII, 14,225 shares held by PVEMI and 72,053 shares held by the Trust. Mr. Pelowski disclaims beneficial ownership of all such shares except to the extent of any pecuniary interest therein.</footnote>
        <footnote id="F5">Represents 3,347 shares of common stock and 5,181 restricted stock units that will vest on June 29, 2019, the first anniversary from grant date, subject to Mr. Pelowski's continued service on the board of directors on the vest date.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Ken Pelowski</signatureName>
        <signatureDate>2018-08-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
