A realistic illustration of a fictional marine mammal clade called Marinodychtodontidae. The creature has a streamlined, seal-like body with smooth, waterproof fur in mottled gray and brown. It has a short, rounded skull with large, expressive eyes, conical homodont teeth, and flipper-like forelimbs. Its hind limbs are vestigial, buried within the body, with a short tail ending in a fluke. The animal is swimming underwater in a realistic ocean scene, showing its sleek form and paddle-shaped limbs. Style is detailed and naturalistic, similar to modern marine mammal illustrations. See more