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These are computer-generated image (CGI) animations of the Burgess Shale Biota (Middle Cambrian, southeastern British Columbia, Canadian Rockies) composed by & on display at the Field Museum of Natural History in Chicago, Illinois, USA.
Organisms moving around include Opabinia regalis (= dinocarid arthropod), Ottoia prolifica (= priapulid worm), Marrella splendens (= marrellomorph arthropod), Olenoides serratus (= polymeroid trilobite), Anomalocaris canadensis (= dinocarid arthropod), Wiwaxia corrugata (= polychaete annelid worm), Hallucigenia sparsa (= lobopod), Canadia spinosa (= polychaete annelid worm), Eldonia ludwigi (= lophophorate or holothurian), Odaraia alata (=
branchiopod arthropod), and Scenella amii (= helcionelloid mollusc).
Background organisms that aren't really moving around include sponges and algae.
For an introduction to the geology of the Burgess Shale and its world-famous fossils, see:
www.jsjgeology.net/Marrella-sp...
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