cyclostome
/ˈsaɪkləˌstoʊm/
noun
- A type of jawless fish, such as a lamprey or hagfish, that has a round, sucking mouth.
- Scientists study cyclostomes to learn about the evolution of early vertebrates.
- Unlike most fish, a cyclostome has no scales or paired fins.
- The cyclostome uses its round mouth to attach to other fish and feed on their blood.