Lampreys Have Reduced the Size of Commercial Fish Populations in the Great

Question

Lampreys have reduced the size of commercial fish populations in the Great Lakes because they
A) secrete toxins that injure or kill other fishes.
B) are parasites on those fish species.
C) share many of the same predators.
D) are predators to many of the same prey species.
E) compete for food with those fish species.

Accepted Answer

Lampreys are parasitic and attach themselves to fish, feeding on their blood and bodily fluids, which can weaken or kill the host fish, thus reducing commercial fish populations.