The number of grilled fish tacos per person can vary depending on the size and appetite of each individual. Generally speaking, most people would be satisfied with one to two grilled fish tacos per person if they were served in a meal, though more could be eaten depending on the situation. If served as an appetizer, two to three tacos per person may be appropriate. Also, it's important to consider the accompaniments; if they are small side dishes, then more tacos may be necessary, while larger sides will mean fewer tacos. Ultimately, the exact number of tacos that should be served will depend on the preferences and appetites of those who are dining.