Which species mentioned is noted as a non-parasitic lamprey that does not feed as an adult?

Answer

Least Brook Lamprey (*Lampetra appendix*)

The Least Brook Lamprey is cited as an example of a non-parasitic species where adults enter a brief reproductive phase without feeding after metamorphosis.

Which species mentioned is noted as a non-parasitic lamprey that does not feed as an adult?
animalclassificationlarvalampreyAmmocoetes