A lot of fish need to be frozen for a period of time to kill the parasites to the FDA standards. Some types of fish and some farmed and contained fish doesn't n

A lot of fish need to be frozen for a period of time to kill the parasites to the FDA standards. Some types of fish and some farmed and contained fish doesn't need this treatment though. I don't think proximity to the ocean is a good metric as you can freeze fish for a few months with no noticeable degradation in quality. It can be held indefinitely at 0 degrees F I believe as well.