From Avalara LandedCost, by the LandedCost Research Team, updated June 1, 2017.
This page provides an overview of the basic import duty rates applied to goods that fall under the classification code 0303540000 in Costa Rica. This product category is defined to include:
"Mackerel (scomber scombrus, scomber australasicus, scomber japonicus)"
Costa Rica is involved in a total of 2 trade agreements, and is associated with 2 country groups.