Ancient survivors that have been around for 360 million years!
They're not eels, and they're not what you think.
Lampreys are jawless fish that look like eels but are completely different creatures. They're living fossils - older than dinosaurs!
Imagine a creature so ancient it watched the first trees grow, survived multiple mass extinctions, and is still here today. That's a lamprey - one of nature's most successful designs.