HSIBI stands for the Hawai'i Stream Index of Biological Integrity.

The HSIBI utilizes five ecological categories(taxonomic richness, sensitive species, reproductive capacity, trophic-habitat capacity, and tolerance capacity) and 11 metrics to distinguish a stream's biological condition on a scale ranging from undisturbed to severely impaired.

90 - 100: Excellent
79 - 89.9: Good
69 - 78.9: Fair
40 - 68.9: Poor
< 39.9: Impaired

A visit is a field survey conducted using the Paepae method.

Paepae is a fish population survey method that utilizes sound and vibration to herd animals downstream to be collected and counted by a the survey team.