If your fishing employer has a "covid plan" in place with Alaska Dept of Commerce, then you can work right away, as commercial fishing (boats and processors) are considered critical infrastructure. Still they suggest you being quarantined (im guessing) to a boat or bunkhouse when not performing work or critical duties (food, health,etc.)
"Self-Quarantine: All workers arriving in the State must follow the 14-day self-quarantine guidance. If your business meets the definitions of critical infrastructure workers, you may put them to worker immediate, provided that you have an approved Community/Workforce Protective Plan and that you enact the protective measures in your plan to safeguard the surrounding community and the remainder of your workforce from the newly arrived workers. The intent is that, to the greatest extent possible, workers will self-quarantine at their final destination in Alaska in order to reduce the risk of infection during onward travel. In cases where this is not possible for some reason, you would need to identify the reason and what the company’s alternate plan is for self-quarantine. "