Yes, because lampreys are jawless fishes with tooth, funnel-like sucking mouth. While lampreys are well known for those species which bore into the flesh of other fish to suck their blood, these species make up the minority.
Surfeit of Lampreys was created in 1941.
Sea lampreys drink or eat blood
Sea Lampreys have been known since ancient times.
Sea lampreys are fish.
lampreys are only hunted by man
No, lampreys are a cartilaginous fish, and being made of cartilage, they have no bones.
Lampreys differ from hagfishes by having a notochord that is surrounded by a tube of cartilage.
Birds and mammals are air breathers. Lampreys are not.
Lampreys aren´t a class, they´re a separate species. But yes, they are motile, they swim freely - that is, until they attach themselves to a fish host with their mouths and start scraping off flesh with their tongue. But they can let go and swim away whenever they want.
blood
no
No, they are ectothermic