sentence: Lampreys are eel-like, scaleless animals.
sentences_after: They have well-developed eyes, one or two dorsal fins, a tail fin, a single nostril on top of the head, and seven gill openings on each side of the body. Like the hagfishes, they lack bones, jaws, and paired fins.
concept_name: lamprey
headings: Lamprey Description
categories: Vertebrates