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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-03-28</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>2018-03-28</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>42016</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>6.66</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2649435</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2018-03-28</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>16865</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>16.60</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2632570</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3347</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F4"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Common Stock Warrant (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>6.66</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2018-03-28</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>42016</value>
                    <footnoteId id="F5"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2009-11-16</value>
            </exerciseDate>
            <expirationDate>
                <value>2019-11-16</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>42016</value>
                    <footnoteId id="F5"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>42016</value>
                    <footnoteId id="F5"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">On March 28, 2018, Pinnacle Ventures I (Q) Equity Holdings, L.L.C., Pinnacle Ventures I Affiliates, L.P. and Pinnacle Ventures II Equity Holdings, L.L.C. (collectively, the &quot;Exercising Entities&quot;) exercised warrants to purchase a total of 42,016 shares of the Issuer's common stock for $6.66 a share. The Exercising Entities paid the exercise price on a cashless basis, resulting in the Issuer's withholding of 16,865 of the warrant shares to pay the exercise price and issuing to the Exercising Entities the remaining 25,151 shares.</footnote>
        <footnote id="F2">Represents securities held by Pinnacle Ventures I Affiliates, L.P., Pinnacle Ventures I-A (Q), L.P., Pinnacle Ventures I-B, L.P., Pinnacle Ventures Management I, L.L.C., Pinnacle Ventures II-A, L.P., Pinnacle Ventures II-B, L.P., Pinnacle Ventures II-C, L.P., Pinnacle Ventures II-R, L.P., Pinnacle Ventures Management II, L.L.C., Pinnacle Ventures Equity Fund I, L.P., Pinnacle Ventures Equity Fund I-O, L.P., Pinnacle Ventures Equity Fund I Affiliates, L.P., Pinnacle Ventures II Equity Holdings, L.L.C. and Pinnacle Ventures I (Q) Equity Holdings, L.L.C. (collectively, the &quot;Pinnacle Entities&quot;), which are managed by general partner limited liability companies. Ken Pelowski is either the sole or controlling managing member of each such limited liability company and, as such, is deemed to have sole voting and dispositive power with respect to the shares held by the Pinnacle Entities.</footnote>
        <footnote id="F3">(Continued from Footnote 2) Mr. Pelowski disclaims beneficial ownership of such shares except to the extent of any pecuniary interest therein.</footnote>
        <footnote id="F4">These securities represent restricted stock units previously granted to the reporting person pursuant to the Issuer's non-employee director compensation policy.</footnote>
        <footnote id="F5">Represents 13,588 shares directly owned by Pinnacle Ventures I (Q) Equity Holdings, L.L.C., 277 shares directly owned by Pinnacle Ventures I Affiliates, L.P. and 28,151 shares directly owned by Pinnacle Ventures II Equity Holdings, L.L.C.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Ken Pelowski</signatureName>
        <signatureDate>2018-03-30</signatureDate>
    </ownerSignature>
</ownershipDocument>
