Rocks and Fossils 4: Pachyrhizodus salmoneus What kind of animal is it? How many body parts can you spot? Expand This is a fossilised fish called Pachyrhizodus salmoneus. It lived millions of years ago. It would have looked a bit like a salmon, which is reflected in its Latin name Look closely to spot a large eye socket, a mouth containing hundreds of small sharp teeth, a pectoral fin (just behind the eye) and lots of fossil scales. It’s the front of a fossil fish that swam in the prehistoric seas where Folkestone is today.