Index of nonindigenous aquatic animal species is one of a group of measures under the animals indicator -- one or more is required. The animals indicator is under the human-caused change monitoring question for the natural quality.

This measure is reported as a single value for report year.

The table here shows reported invasive water animals trends at Absaroka-Beartooth. As ever, selected measures have filled grey circle, and colors indicate an upward, stable, or downward reported trend. Unselected measures can also be recorded, and are shown as hollow circles in the appropriate color.