Tubby Nailfin

The tubby nailfin replaced its ancestor the elegant nailfin. It doubled in size and gained thicker blubber to keep warm. Its stout feature help retain heat in the polar waters. They will consume stones to create "ballast stones" if they get too fat to dive. It flippers have flatter connected nails to better paddle through the water. Before with sharp nails they risked water seeping through them and even injuring their sides with them.

They have specialized more on enoms since they are much easier to eat than whorls. They uproot them using their large "wooden" incisor teeth. Using less energy hunting they are now free to socialize more and strengthen social bond withing the pod. They enjoy playing and tickling each other with their "nail-fins". They will also swim after each other in a game of tag and even play with small ice bergs by pushing them to each other.