![sea lamprey sea lamprey](https://www.tekportal.net/wp-content/uploads/2018/12/sea-lamprey.jpg)
noun
- a parasitic marine lamprey, Petromyzon marinus, that spawns in fresh water along both Atlantic coasts and in the Great Lakes, where it is responsible for losses of economically valuable fish.
noun
- a common anadromous lamprey, Petromyzon marinus, a form of which occurs in the Great Lakes of N America and causes great losses of fish