There normally a tannish brown they have small dots on them and small hole on the sides of there bodys towards the front for breathing unlike other fish with gills and there mouth is like a suction cup with teeth like a leech.
large streams and small rivers of the Red, St. Croix, and lower Mississippi river systems are the best place to find the chestnut lamprey.
These guys can normally be between 8-10 inches in length and the record is 13.6 inches in canada. Chestnut Lamprey is native in the minnesota because of the mississippi river but there are other types that are smaller that live in lakes around the USA.