Final answer:
Lamprey is the agnathostome among the given options. Agnathostomes are jawless fishes.
Step-by-step explanation:
Lamprey is the agnathostome among the given options. Agnathostomes are jawless fishes and lampreys fall under this category. They belong to a group of primitive vertebrates that lack true jaws. Lampreys are eel-like in shape and have a unique feeding habit where they attach themselves to other fishes and feed on their body fluids.
Learn more about agnathostomes