Short lived adults only spawn once before dying. Brook silversides are found in the St. Lawrence River, the Finger Lakes area, and Lakes Erie and Ontario and their tributaries. They have little interaction with people. American Brook Lamprey American brook lamprey are the only nonparasitic lamprey found in New York State. Their disc-like mouths contain poorly developed teeth, useless for attaching to a host.
Brook lamprey have long, wormlike bodies.
Their dark skin is smooth and leathery and without scales. They average six to eight inches in length. Brook lamprey are only found in clear, cold brooks and small streams. In addition, brook lamprey lack a spinal cord. Instead, these fish have a notochord which functions in the same manner as the spinal cord.