[3] These fish are native to the Lahontan Basin of southeastern Oregon, Nevada, and northeastern California, and southwestern Idaho, as seen in the image below.

[1] The Tahoe Sucker is considered a stream generalist, however it reaches its greatest size and numbers in lakes and reservoirs.

[1] The Trophic position of Tahoe Suckers within Cascade Lake indicates a primarily small organism based-diet.

Suckers typically feed at night time, in order to avoid predation from larger fish such as Lake Trout.

Nuptial tubercles begin to appear on both sexes prior to the onset of the mating season, although they are rare on females.

Lake Trout tend to feed on a multitude of different species, including sculpins, Cladocera, and suckers.

The coarse scale variation of the Tahoe Sucker was originally thought to be an entirely separate species, known as Catostomus Arenarius.

[9] However, it was determined that this newfound "species" was simply based on large, coarse scale variants of Catostomus Tahoensis.

Additionally, those living in streams tend to be significantly smaller and less substantive for food than lake dwelling suckers.

In a census of Nevada fishermen, only game fish were encountered, and Tahoe Suckers were reported in very few cases.

[8] The Tahoe Sucker was most recently assessed in 2011, where it received a rating of Least Concern (LC) for the IUCN Red List.

[12] Therefore, the impact of anthropogenic disturbance on the long term population viability of these species, including climate change, is relatively unknown