tylosaurus hunts dolichorhynchops with sun in background

tylosaurus proriger marine reptile lizard aquatic dinosaur mosasaur predator carnivore hunting animal themes extinct extinction vertebrate organism western interior seaway kansas united states cretaceous period age era epoch flipper teeth evolution prehistoric primeval primitive creature ocean sea life swimming underwater undersea genus species nature wild wildlife dolichorhynchops osborni plesiosaur flippers sun rendering hunts north america background