Only a handful of them have been preserved as fossils ... not mean it is the oldest. That title goes to a marine animal called the placoderm, also called an armoured fish. It existed 400 million ...
Fossils predating the dinosaurs by hundreds ... Thousands of people have walked over the remains of 385 million-year-old fish in the slab of Caithness flagstone outside Inverness Town House.
Researchers have discovered a 380-million-year-old heart preserved inside a fossilised ... Scans of the Gogo fish fossil showed that its heart was more complex than expected for these primitive ...