devonian lake scene

ago ancient animal aquatic arthropods blastoids bottom cambrian creature cycle depicting devonian diorama dunkleosteus dwelling enormous environment era eurypterids eurypterus extinct extinction feed feeds fish fossil geology giant gondwanaland grand history illustration jaws lake laurasia life marine million monster nature ocean paleontology period placoderm placoderms powerful predator prehistoric prey primitive render research scene science scorpions sea seafloor smaller swimming teeth trilobites undersea underwater water years