Number of Nonindigenous Aquatic Species in the US by Pathway of Introduction
Aquarium pet releases    161
Sportfishing                     114
Bait bucket releases            94
Forage                                 48
Human food                         22
Conservation                       21
Biocontrol                            20
Ornamental                         19
Aquaculture farms                  6
Unknown                                4
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Number of Nonindigenous Aquatic Species in the US by Pathway of Introduction