Recent Trends of Nonindigenous Aquatic Species in the Temperate Regions of North America

Taxa

•Amphibians 42

•Annelids 38

•Coelenterates 27

•Crustaceans 131

•Fishes 610

•Mammals 3

•Mollusks 148

•Reptiles 50

•Sponges 7

•Tunicates 19

•Miscellaneous 15

Myocastor coypus

Styela clava

Membranipora membranacea

Here is how it breaks down by taxa. Most are freshwater, but we are collecting more marine records. The majority of these records come from 3 sources which are scientific literature, museum specimens, and personal communications with scientists and biologists, etc. Our database documents single occurrences, they do not have to represent established populations. Many of the species are native to North America, but have transferred to non-native drainages.