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.
Nearly 200 larvae, particularly in silty pools.
The shad lamprey is traditionally very appreciated in Portugal, being a very expensive gourmet dish. They are kept alive in tanks like this one until they are needed in the kitchen. This tank belongs to a restaurant located just by the Mondego river; these fish, however, where probably caught in another river sistem, like the Minho or the Tagus, since the construction of dams and overfishing have seriously reduced the number of fish that make it upstream in the Mondego.
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").