So far, no one has found an intermediate link to prove the so-called evolution of living creatures. This is also true for the so-called "evolution" of fish. All different classes of fish appear suddenly in the fossil record, and without any ancestors. There are hundreds of thousands of invertebrate fossils, hundreds of thousands of fish fossils, but not one single intermediate "missing link" fossil. One example showing that fish have always been fish is this 144- to 127-million-year-old fossil sturgeon.