Four Pikaia predatory arthropods search for prey in Cambrian Seas.

ANIMAL THEMES • ANIMAL • ANIMALS HUNTING • AQUATIC • ARTHROPOD • ARTHROPODA • ARTHROPODS • ARTWORK • BIOLUMINESCENCE • BLUE • BRITISH COLUMBIA • BURGESS SHALE ANIMAL • BURGESS SHALE FORMATION • CAMBRIAN • CHORDATE • COLOR IMAGE • COLOUR IMAGE • CREATURE • DANGER • DAY • DIGITALLY GENERATED IMAGE • ENVIRONMENT • EVOLUTION • EXTINCT • FISH • FLEET • GROUP OF ANIMALS • HORIZONTAL • ILLUSTRATION • ILLUSTRATIONS • INVERTEBRATE • JELLYFISH • LATERAL VIEW • MARINE BIOLOGY • MARINE • MEDIUM GROUP OF ANIMALS • MENACE • NATURAL HISTORY • NATURAL SCIENCES • NATURE STUDY • NAVY • NO PEOPLE • NOTOCHORD • OCEAN FLOOR • OCEAN • ORGANISM • OUTDOOR • OUTDOORS • OUTSIDE • PALAEONTOLOGY • PALAEOZOOLOGY • PALEOART • PALEOBIOLOGY • PALEONTOLOGY • PALEOZOIC ERA • PALEOZOOLOGY • PAST • PERIL • PIKAIA GRACILENS • PIKAIA • POISONOUS • PREDATOR • PREHISTORIC ERA • PRIMEVAL • PRIMITIVE • SALTWATER FISH • SCIENCE: EVOLUTION • SEA FISH • SEA LIFE • SEA • SEABED • SEARCHING • SEAS • SIDE VIEW • SPECIES • STINGER • SWIMMING • TENTACLE • THREAT • UNDERSEA • UNDERWATER • VENOMOUS • VERTEBRATE • WATER • WILDLIFE • WITHOUT PEOPLE • WORM • ZOOLOGY