First, refer to the Permit Guide to Aquaculture in CA, linked above, to learn how various agencies are involved in permitting or regulating aquaculture in California.
After familiaring yourself with these agencies' roles, contact the California State Aquaculture Coordinator with an initial description of your project idea to ensure your project is ready for the permitting process and next steps.

Once the Aquaculture Coordinator has designated your project ready for permitting, Register with the Department to create a username. Once you have activated your login, return to this page & log in at the top of the page to gain access to your project. 

Once you've registered for a login with the Department of Fish & Wildlife, use this form to provide information for your project file.