EXHIBIT 32.3 CERTIFICATION OF CHIEF ACCOUNTING OFFICER PURSUANT TO RULE 13a-14(b) OR RULE 15d-14(b) AND 18 U.S.C. SECTION 1350 In connection with the Quarterly Report on Form 10-Q of The Meridian Resource Corporation (the "Company") for the quarter ended September 30, 2004, as filed with the Securities and Exchange Commission on the date hereof (the "Form 10-Q"), I, Lloyd V. DeLano, Chief Accounting Officer of the Company, certify pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that: 1. The Form 10-Q fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 2. The information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company. Date: November 9, 2004 /s/ Lloyd V. DeLano -------------------------------------- Lloyd V. DeLano Chief Accounting Officer 39