Introduction to the Petromyzontiformes Lampreys The long, eel-like fish drinking the blood of this lake trout is one of nearly fifty species of lampreys, a group of jawless fishes found in temperate rivers and coastal seas. Some species live in fresh water for their entire lives. Others, like the sea lamprey (Petromyzon marinus) shown here, are anadromous. That is, they are hatched and grow in ...

PACIFIC LAMPREY DID YOU KNOW: The Pacific Lamprey has no true fins, jaws, or bones. SCIENTIFIC NAME: Lampetra tridentata , from the Latin lambere, to suck, petra meaning stone, and tridentata meaning three-toothed. COMMON NAMES: Pacific sea-lamprey, three toothed lamprey, tridentate lamprey, and sea lamprey. DESCRIPTION: The lamprey has a round, elongate, flexible cartilaginous body, and skin ...