Percentages of All Aquatic Species in the US Introduced from Other Continents
•South America 22
•Asia 20
•Eurasia 16
•Europe 13
•Africa 12
•Central America   6
•Australia   2
•South Pacific   1
•Oceans   1
•Unknown   4
The high number from South America includes much of the cichlids (Tilapia) and the tropical fish for the aquarium trade. We also get tropical fish for the aquarium trade from southeast Asia.