September 3, 2015 Securities and Exchange Commission Office of Filings and Information Services treet, NE Washington, DC 20549 RE: Dreyfus Opportunity Funds - Dreyfus Natural Resources Fund 1933 Act File No.: 333-34474 1940 Act File No.: 811-09891 CIK No.: 0001111178 Ladies and Gentlemen: Pursuant to Rule 497(j) under the Securities Act of 1933, this is to certify that the form of the Prospectus that would have been filed under paragraph (b) or (c) of this section does not differ from that contained in the most recent amendment, Post-Effective Amendment No. 69 to the Registration Statement, electronically filed with the Securities and Exchange Commission on August 26, 2015. Please address any comments or questions to my {{EMAIL+PHONE}}. Sincerely, /s/ Elyse Cardona Elyse Cardona Paralegal

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