anomalocaris in cambrian seas

animal anomalocaris aquatic arthropod biofluorescent bioluminescence blue burgess cambrian canadensis carnivorous creature dangerous environment era evolution extinct extinction fish group illustration image invertebrate jellyfish life lobes marine nature ocean organism palaeozoic paleoart picture poisonous predator prehistoric primeval primitive reef saltwater sea shale small species sponge stinger stinging swim swimming tentacle themes tropical undersea underwater wildlife