The ten-meter-high column of water slowly vanished. Xia Qiu then continued drawing in air and storing it in his lungs.
The dark shadow that had blasted out the water column was Xia Qiu.
Strictly speaking, what he had expelled was not a column of water, but waste gas from breathing. After the airflow shot out through the nostrils atop his head, it carried along the surrounding seawater and formed a water column.
The reason he could breathe was that Xia Qiu's bodily structure had changed again.
He had grown lungs, as well as two nostrils behind the ram on top of his head.
Growing lungs had not happened overnight.
The evolution could be traced back to around four years ago, when he had hunted dolphins. After that, he had hunted many more dolphins, a blue whale, and Fish-Men.
Ordinary Fish-Men provided more Reinforcement Energy and less Evolution Energy, but not none at all. This was especially true for powerful ones like Arlong, Kuroobi, and Chuu, not to mention that he had eaten a great many Fish-Men himself.
The evolution information with the greatest abundance was probably that of lungs.
Combined with his previous hunts of marine mammals, that was how he had developed lungs.
Xia Qiu could breathe on the surface, absorb oxygen and store it in his lungs, then dive beneath the sea.
A single dive could last twenty minutes.
Being able to breathe with lungs meant that Xia Qiu was moving toward becoming a marine mammal.
Live birth, nursing, lung breathing, and a constant body temperature.
Xia Qiu had no way to confirm the live birth and nursing part, because the difference between live birth and egg-laying was that in the former, a fertilized egg developed inside an individual's uterus, while in the latter, the fertilized egg developed