Do lamprey harm sharks?
Do lamprey harm sharks? Sea lampreys are parasites in their adult stage. They attack a wide range of salt- and freshwater fish, including herring, mackerel, salmon, trout and even some sharks, using its 'sucker' to attach to its host and rasp out a whole with its rough tongue.
Are lampreys good for anything?
Good Lamprey, Bad Rap First, we know they help maintain the health of river ecosystems. River ecologists are learning more about how spawning lamprey clean stones during their nest-building activities. In so doing, they “condition” spawning habitat for salmon whose eggs require clean, well-oxygenated substrate.