* Size: Newborn narwhals are relatively large when born, measuring around 59 to 63 inches (150 to 160 centimeters) in length.
* Weight: They typically weigh between 154 to 176 pounds (70 to 80 kilograms).
* Coloration: Unlike adult narwhals, newborns have a generally brownish-gray body color. This coloration provides them with camouflage in the water.
* Skin Pattern: Their skin often displays a mottled or spotted pattern, which helps to further blend them into their environment.
* Dorsal Fin: Newborn narwhals have a small, triangular dorsal fin located towards the middle of their back. This fin is less pronounced than in adult narwhals.
* Flukes: The flukes of a newborn narwhal's tail are relatively small compared to those of adults. They are also dark in color, contributing to the overall camouflage of the calf.
* Narwhal "Tusk": At birth, male and female narwhals possess two tiny tooth buds in their upper jaw. However, only the males develop one of these buds into the distinctive tusk that they are known for.
Over time, as a baby narwhal grows and matures, its physical appearance will change. The mottled coloration will gradually transition to the white or light gray seen in adult narwhals, and the narwhal "tusk" will develop in males.