A diverse array of animals was found in fossils from the Burgess Shale site in British Columbia,
dating from the Cambrian period of the Phanerozoic eon.
They include:
Pikaia (swimming eel-like chordate)
Hallucigenia (with toothpick-like spikes on seafloor
Anomalocaris (large predator with hooked claws)
Marella (arthropod swimming at left)
Ottoia (burrowing U-shaped worm) 7