According to the U.S. customs website ( http://www.customs.ustreas.gov/xp/cgov/travel/vacation/kbyg/" rel="nofollow noopener" target="_blank">http://www.customs.ustreas.gov/xp/cgov/travel/vacation/kbyg/):
Fish, if it is for your personal use, is generally admissible.
Read the answer to the topic: \"What food can I bring into the United States (fruit, cheese, meat, etc)?\" It is near the bottom center of the page.