NatureServe has compiled detailed data on the
current and historic distributions of the native freshwater fishes of the United
States, excluding Alaska and Hawaii. We believe these data are a useful tool
for aquatic research and analyses and for conservation planning. Presented here
are lists of the native fish species of each small watershed (8-digit cataloging
unit) as defined by the U.S. Geological Survey. (There are 2,064 such watersheds
in the 48 states. To learn how these watersheds are defined, see the USGS's
Science in Your Watershed website).
Using the Clickable Map
On the map below, users can search by zooming in to one of 16 sections of the country. From the selected sub-area on the map, click on a particular watershed to bring up a table listing all native freshwater fish species known to currently or historically occur in the watershed. Then click on the scientific name of any species to bring up the species' Comprehensive Report from NatureServe Explorer, our online searchable database on species and ecological communities. To search directly for a specific species, use the Search feature in NatureServe
These data derive in part from precise location data (element occurrences) compiled by state natural heritage programs for 307 vulnerable or imperiled U.S. fish species. The natural heritage-derived locational data were supplemented with information from the scientific literature and from species experts to compile the most complete distributional information possible for these species at the level of USGS 8-digit cataloging unit.
These data are dynamic with new records frequently being added and old records being revised as new information is received. As a result, the information on this website should not be considered a definitive statement on the presence or absence of freshwater fishes in any given watershed, nor should be used as a substitute for on-site surveys required for environmental assessments.
In any dataset such as this there will be errors of omission
as well as errors of commission. We ask users of these data to let us
know about such errors so that the data can be improved over time for
the future benefit of all users. Comments can be submitted through the
Feedback link below or by email
to Larry Master, Chief Zoologist. Please cite the data source for any
comments regarding omissions or changes in status (e.g., current to historic-only).