Cyanotech (CYAN) 10-K 2019 FY Annual report

Exhibit 32.1

Certification of CEO and CFO

Pursuant to 18 U.S.C. Section 1350,

As Adopted Pursuant to Section 906

of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report of Cyanotech Corporation (the “Company”) on Form 10-K for the period ended March 31, 2019 (the “Report”) as filed with the Securities and Exchange Commission on the date hereof, each of the undersigned certifies that:

1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act (15 U.S.C. 78m or 78o (d)); and

2) The information contained in the Report fairly presents, in all material aspects, the financial condition and results of operations of the Company.

Date: July 1, 2019	/s/ Gerald R. Cysewski
	Gerald R. Cysewski
	Chief Executive Officer; Vice Chairman of the Board
Date: July 1, 2019	/s/ Brian B. Orlopp
	Brian B. Orlopp
	Vice President—Finance & Administration and CFO
	(Principal Financial and Accounting Officer)