Yellow-Belly Nailfin

The yellow-belly nailfin replaced its ancestor, the ramul nailfin. It has gotten smaller and has developed a more streamlined shape for swimming. Its limbs are configured better for walking on the beach as well. Its teeth now form a "pseudo-beak" which its uses to break open spikeshelled sandflora and thornshells. They can swim very fast and will catch shortbeak gilltails by working together in small packs.

The larger males will fight each other on the beach in order to mate with the females. They can do considerable damage with their strong "pseudo-beaks" however their thick blubbery hide not only help protect them in fight but stay warm in the winter. The females give birth in the spring and then will get food for their 2 to 3 offspring in the summer until they are old enough to leave on their own.