The size of a single-horned white whale ranged between one-hundred to three-hundred yards and had nothing to do with their age or gender. No matter how big the whale was, their combat abilities were astounding. The gigantic magic nuclei in their brains provided them with powerful abilities. Their defense was even better than pan's turtles; hence they had little to no enemies in the Oceanic Ice Block.
The silver line golden spearfish was one of the few creatures that could kill a single-horned white whale, but there were very few of them. The spears on ordinary spearfish were sharp, but they were no match for single-horned white whales. Only the combination of speed, explosiveness, and its spear allowed the silver line golden spearfish to pierce through its prey easily.
Even Saleen was careful not to let the pan's turtle alchemical boat get pierced by the spearfish or else there would surely be holes in the ship.
