All the following statements are correct about Petromyzon (Lamprey), except
A. Lampreys are marine and migrate for spawning into rivers (Anadromous)
B. Their characteristic ammocoete larvae after matamorphosis migrates back to the ocean
C. After spawing the adult lamprey stops feeding and migrates back to ocean where it lives
D. It is a sanguivorous ectoparasite on other fishes
