Where did tacos de pescado ( " fish tacos " ) orginiate ?
Meats for these types of tacos typically include : " Tripa " ( " tripe " , usually from a pig instead of a cow ) ; " Suadero " ( tender beef cuts ) , " Carnitas " and " Buche " ( Literally , "" crop "" , as in " bird 's crop " ; here , it is fried pig 's esophagus .