Agnatha – Characteristics, Classification, Morphology, Reproduction
Agnatha are a primitive group of jawless fish that have existed for hundreds of millions of years. Creatures like lampreys and hagfish fall into this category. Unlike typical fish, they lack jaws, paired fins, and bony skeletons, relying on flexible cartilage for support. Lampreys often attach to other fish to feed on their bodily fluids, … Read more