Trilobites, the name meaning Three lobes, were prehistoric animals.
Trilobites ate both algae on the sea floor and small organisms. They were slighly armored sea creatures that looked a bit like slaters. These sea creatures were arthropods and evolved sturdy exoskeletons on the outside of their bodies. up to 15,000 species of trilobites existed in the Paleozoic era. They lived worldwide between the Cambrian and Permian periods in the sea. modern crabs are relatives of them but trilobites are not alive today.
They ranged from a small size, 2 centimeters in length, to the largest species, Isotelus, which grew to an enormous for trilobites 72 cm long which was about as big as they got.
Some of them ate plankton, others dead animals. Their eyes were made of calcite. they became extinct at the end of the Permian due to the mass extinction.
The name trilobite means "three lobes".
Appearances in the programmes
A group of Trilobites (possibly Redlichia) were seen in the first episode. They were feeding until one was eaten by an Anomalocaris.