The law prohibits fish caught under the authority of a sport fishing license to be bought, sold, traded or bartered (Fish and Game Code, Section 7121). You can read about how to run a commercial fish business in this CDFW guide.

• To sell commercially caught fish, you will need a Fish Business License. 
• The Fisherman’s Retail License only allows a commercial fisherman to sell their catch to the penultimate consumer (individual people). This license is only issued to an individual and cannot be used by a business, partnership, or husband and wife. 
• If you are planning to sell to businesses or restaurants, then you will need to purchase the Fish Receiver’s License. 

All fish caught under the authority of a commercial fishing license, even for personal use, must be landed and documented on an electronic fish ticket and submitted to E-Tix. Commercial fishermen must locate a licensed fish business willing to purchase their catch or they must possess a Fisherman’s Retail License to report their commercial fish landings through the E-Tix portal. You can find additional information about commercial fishing on the CDFW website.