This is a Southern Brook Lamprey that was found in a creek in Georgia. This was pulled up while seining. We pulled up multiple of them. However, they are an invasive species here. The shape of the head along with the dorsal fin shows that this is an adult.
At visitor's center at Bonneville Dam fish ladder.
Ahtanum Creek in Union Gap, WA
A native non-parasitic lamprey that loves sandy stream bottoms
An adult lamprey spotted on its return to the river to breed.
Apparently Geotria australis?
One of two specimens found on adult steelhead today in the northern portion of the Rocky River.
A "school" of six sea lampreys, varying in size from about 12 inches to more than two feet. One centrally visible in the light in the photo, two others in the upper left. A few of them had greyish-white splotches near the head and front of the body.
Lampreys (sometimes also called lamprey eels) are an order of jawless fish, the adult of which is characterized by a toothed, funnel-like sucking mouth. The common name "lamprey" is derived from lampetra, which translated from Latin means "stone licker" (lambere "to lick" + Greek πέτρα "stone").