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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 GqtbI0yoqi8mIIqLfzqBbQ==

<SEC-DOCUMENT>0001140361-11-000143.txt : 20110103
<SEC-HEADER>0001140361-11-000143.hdr.sgml : 20101231
<ACCEPTANCE-DATETIME>20110103154004
ACCESSION NUMBER:		0001140361-11-000143
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20101231
FILED AS OF DATE:		20110103
DATE AS OF CHANGE:		20110103

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Fox Rick D
		CENTRAL INDEX KEY:			0001392232

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33628
		FILM NUMBER:		11501774

	MAIL ADDRESS:	
		STREET 1:		1021 MAIN (ONE CITY CENTRE)
		STREET 2:		SUITE 2626
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77002

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ENERGY XXI (BERMUDA) LTD
		CENTRAL INDEX KEY:			0001343719
		STANDARD INDUSTRIAL CLASSIFICATION:	OIL AND GAS FIELD EXPLORATION SERVICES [1382]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			D0
		FISCAL YEAR END:			0129

	BUSINESS ADDRESS:	
		STREET 1:		CANONS COURT
		STREET 2:		22 VICTORIA STREET PO BX HM 1179
		CITY:			HAMILTON
		STATE:			D0
		ZIP:			00000
		BUSINESS PHONE:		713 351 3003

	MAIL ADDRESS:	
		STREET 1:		CANONS COURT
		STREET 2:		22 VICTORIA STREET PO BX HM 1179
		CITY:			HAMILTON
		STATE:			D0
		ZIP:			00000

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ENERGY XXI ACQUISITION CORP BERMUDA LTD
		DATE OF NAME CHANGE:	20051107
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-12-31</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001343719</issuerCik>
        <issuerName>ENERGY XXI (BERMUDA) LTD</issuerName>
        <issuerTradingSymbol>EXXI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001392232</rptOwnerCik>
            <rptOwnerName>Fox Rick D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1021 MAIN</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 2626</rptOwnerStreet2>
            <rptOwnerCity>HOUSTON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77002</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Controller</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-12-31</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>846</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>13.481</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9490</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The shares were purchased under the Employee Stock Purchase Plan which allows employees to purchase common stock at a 15 percent discount from the lower of the common stock closing price on the first or last day of the period. This period was from July 1, 2010 through December 31, 2010.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/S/  RICK D. FOX</signatureName>
        <signatureDate>2011-01-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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