The king nailfin has split from its ancestor, the coastal nailfin, and moved south to the King Coast. There, its diet changed from an omnivore to a straight carnivore, as it took advantage of the newly evolved sand enomena. Its physical changes from its ancestors include a raking set of teeth, elongated nails, and a flattened back.
The majority of the king nailfin's diet consists mainly of grazing on the stationary sand enomena. Thus, this creature evolved rake like sharp teeth to shred the tentacles and rubbery trunk of the sand enomena. While these teeth give the creature a menacing appearance they remain to be quite docile and gentle creatures who live a very social lifestyle.
Like their ancestors, the king nailfins are very social creatures. They live in bonds and have strong bonding sessions in which they tickle each other with their nail fins. This species has gone through a process by which their nails have separated and elongated, in order to better tickle prospective mates. The king nailfins with the longest nails are the most attractive to the pod members. However, with this evolution, they also had to rid themselves of some of their speed. This is alright for this species in their new habitat, since they have little to no competition besides each other for food.
These creatures continue to be monogamist maters and their gestation period is still very long. The backs of the species have evolved to better help their young by flattening out, so the young can better position themselves after being born. This flattened back makes it easier for the parents to aid their young when first learning to breathe and swim.
Like their ancestors, the king nailfins still have two sets of eyes, two sets of fins, and a thin membrane leading from their butt-nostril to their tails to aid them when swimming.