Which entity tracks the Nile perch as a nonnative aquatic species due to the ecological changes it causes?

Answer

The US Geological Survey (USGS)

The US Geological Survey's Nonindigenous Aquatic Species database tracks species like the Nile perch because of the profound ecological alterations they inflict.

Which entity tracks the Nile perch as a nonnative aquatic species due to the ecological changes it causes?
PredatorfishfactNile Perch