Preferred shopping day for seafood at mercado

I will be arriving on a Saturday evening. I will be wanting to buy fish and camarones for dinners for a series of meals over about five weeks.

I have heard that Monday is not a preferred day for buying fish at the mercado because the fishers don’t go out on Sunday.

I’m thinking I could do my buying on Sunday or Tuesday. Does anyone have any suggestions?

Shrimp is not a local product. You can always find fresh fish on the downtown beach, even on Monday. Just get there early.