Agnathan Review

You won't find the side fins (pectoral or pelvic) typical of modern fish.

They have long, slender shapes that allow them to move through water with a snake-like undulation. The Survivors: Lampreys and Hagfish agnathan

Often called the "vampires of the deep," many lamprey species are parasitic. They use their funnel-like, tooth-lined mouths to latch onto other fish and feed on their blood and tissue. While they can be harmful to local fish populations in some regions, they are also an ancient and vital part of many freshwater and marine ecosystems. You won't find the side fins (pectoral or

Known as "slime eels," these scavengers live in the deep ocean. When threatened, they can produce massive amounts of thick, sticky slime in seconds to deter predators. They play a critical role in "cleaning" the ocean floor by consuming carcasses. Why They Matter They use their funnel-like, tooth-lined mouths to latch

Welcome to a journey back in time—over 500 million years, to be exact. Before sharks patrolled the reefs or dinosaurs walked the earth, the oceans were ruled by a group of pioneers: the . These "jawless fish" represent some of the most primitive vertebrates still alive today, offering us a living window into the very dawn of vertebrate evolution. What Exactly is an Agnathan?

Next time you think of a fish, look beyond the scales and jaws. Remember the Agnathans—the resilient, jawless wonders that have survived five mass extinctions. They remind us that sometimes, the simplest designs are the ones that endure the longest.