According to 1099misc instructions - http://www.irs.gov/pub/irs-pdf/i1099msc.pdf
Fish purchases. If you are in the trade or business purchasing fish for resale, you must report total cash of $600 or more paid during the year to any person who is engaged in the trade or business of catching fish. Report these payments in box 7. You are required to keep record showing the date and amount of each cash payment made during the year, but you must report only the total amount paid for the year on Form 1099-MISC.
“Fish” means all fish and other forms of aquatic life. “Cash” means U.S. and foreign coin and currency and a cashier’s check, bank draft, traveler’s check, or money order. Cash does not include a check drawn on your personal or business account.