The United States of America is being the top country by fish species, threatened in the world. As of 2016, fish species, threatened in the United States of America was 249 number that accounts for 3.43 % of the world's fish species, threatened. The top 5 countries (others are India, Mexico, the United Republic of Tanzania, and Indonesia) account for 13.57 % of it. The world's total fish species, threatened was estimated at 7,250 number in 2016.
Fish species are based on Froese, R. and Pauly, D. (eds). 2008. Threatened species are the number of species classified by the IUCN as endangered, vulnerable, rare, indeterminate, out of danger, or insufficiently known.