Mosasaurus hoffmanni swimming in prehistoric waters.

AGGRESSION • AIGIALOSAUR • ANGRY • ANIMAL HEAD • ANIMAL MOUTH • ANIMAL TEETH • ANIMAL THEMES • ANIMAL • ANIMALS IN THE WILD • AQUATIC • ARTWORK • CARNASSIAL • CARNIVORE • COLOR IMAGE • COLOUR IMAGE • CREATURE • CRETACEOUS • DAY • EVOLUTION • EXTINCT • FANG • FIERCE • FISH • FLIPPER • FORT • HORIZONTAL • ICHTHYOLOGY • ILLUSTRATION TECHNIQUE • ILLUSTRATION • ILLUSTRATIONS • JAW • LATERAL VIEW • LIGHT • LIZARD • LONELINESS • MARINE BIOLOGY • MESOZOIC ERA • MOSASAUR • MOSASAURUS • MOUTH OPEN • NATURAL HISTORY • NATURAL SCIENCES • NATURE STUDY • NO PEOPLE • ONE ANIMAL • OPEN MOUTH • OPEN-MOUTHED • OUTDOOR • OUTDOORS • OUTSIDE • PAINTING • PALAEONTOLOGY • PALAEOZOOLOGY • PALEOBIOLOGY • PALEOICHTHYOLOGY • PALEONTOLOGY • PALEOZOOLOGY • PAST • PREHISTORIC ERA • RAYS OF LIGHT • REPTIL • REPTILE • REPTILES • RUGGED • SCIENCE: EVOLUTION • SCISSOR TOOTH • SEA LIFE • SECTORIAL • SHARP • SHINING • SIDE VIEW • SNOUT • SOLITUDE • SPECIES • SQUAMATA • STRONG • SUNLIGHT • SUNSHINE • SWIMMING • UNDERSEA • UNDERWATER • WILDLIFE • WITHOUT PEOPLE • ZOOLOGY