The appearance of Canglong has the following characteristics:
1. Body size: Canglong was a large marine reptile, with a length of up to 10-20 meters and a weight of up to 15-30 tons. Their slender, streamlined body shape helps them swim quickly in the water.
2. Head: Cangolins have a large head with a long mouth and sharp teeth. Their eyes are located on both sides of the head, which helps them to observe their surroundings. The nostrils of Canglongs are located at the top of the head and have a well-developed olfactory organ, which helps them to track their prey in the water.
3. Neck: The neck of Canglongs was relatively short but very strong, supporting the huge head and mouth.
4. Body: Cangolins had long, cylindrical, muscular bodies. Their torso and tail have a strong propulsion in the water, helping them to swim quickly through the ocean.
5. Flippers: Cangolins had four flippers, two pairs of which were larger and located on either side of the body for swimming and steering, and a smaller pair located at the back of the body for depth control and balance.
6. Skin: The skin of Canglongs may have been covered with a layer of smooth scales, which helped to reduce drag in the water.
7. Tail: Cangolins had a relatively long, flattened tail that helped maintain balance and directional control in the water.
8. Color: Although the exact color of Canglongs is unknown, scientists speculate, based on fossil evidence, that their skin may have been dark grey or black, which helped hide them in the deep sea.
Overall, Cangolins were large, distinctive-looking marine reptiles that were among the top predators in the Late Cretaceous marine ecosystem.