At that time, jawless fish filled the seas, while jawed vertebrates were uncommon. Today, the opposite is true. Lampreys and hagfish are the only surviving groups of the once-dominant jawless ...

Eyeless, jawless, and dependent on their sense of smell to find food, hagfish invade feeble or dead fish by entering through their mouths and settling in their stomachs, where they secrete a slimy ...

Lampreys are another form of ancient, blood-sucking, jawless fish also still in existence today. These findings show that both the hagfish and lamprey evolved their eel-like body form and strange ...

They are fishes, but belong to an exclusive group called cyclostomes, also known as jawless fishes ... It has long been thought that hagfish slime clogs the gills of fish, causing them to choke. There ...