Final answer:
Yes, the lamprey and hagfish are the only living representatives of the class Cyclostomata.
Step-by-step explanation:
The statement is true. Lampreys and hagfish are indeed the only living representatives of the class Cyclostomata. Cyclostomata is a class of jawless fish that includes lampreys and hagfish. These creatures have unique characteristics such as a cartilaginous skeleton, lack of paired fins, and a funnel-like tube for sucking up food.
Learn more about lamprey and hagfish