The leaping nailfin split from its ancestor, the majestic nailfin, and adapted to a specific diet of flying swarmers. Over the generations of randomly just catching them, some majestic nailfins started to leap out of the water after them. After some generations, they became so adapt at it that they now use flying swarmers as their main source of food.
They now weigh 90 kg to allow for higher jumps. Their front fins have also widened to work better for gliding longer periods of time out of the water. They can leap about 3 m in the air. To do this, they have massively muscular tails. They dive down about 30.48 m, then use their tails to shoot up and out of the water.
Their bodies have gone through other changes as well. Their bodies are much smoother and curved, allowing water to roll off them as they swim. They are able to communicate to other members of their packs with their modified breathing apparatus that have a membrane that vibrates, letting out a deep bellowing that sound similar to a mix between a frog and a seal.
Artwork by OviraptorFan