A fresh fish should not smell fishy nor have milky, opaque eyes; it should have bright red gills, firm flesh, and a tight anal cavity.
Whole fish should be stored upright in ice in the refrigerator.
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Tacos have been part of Mexico's culinary heritage for more than 100 years. These folded tortillas can be stuffed with any number of fillings — with each Mexican state claiming stake to their own. Fish tacos are said to come from Baja California, Mexico's northernmost state.