They were not moving very fast.
Xia Qiu had followed behind them for an hour, yet they had only covered around ten kilometers.
From where they had fallen into the water to Jumada Island was twenty nautical miles, roughly thirty-seven kilometers.
Arlong's top speed could approach forty-five kilometers per hour.
But he could not swim that fast.
Not only because it consumed too much stamina, but also because the people behind him swam relatively slowly.
Hachi's speed was decent. Although he was weaker than Arlong, he had six arms, and his body was too large, with a round upper body. He was somewhat slower, at around forty kilometers per hour.
But the Fish-Man soldiers could only reach around thirty kilometers per hour. That referred to instantaneous speed; even swimming at full strength for an hour, they could at most cover twenty-five kilometers.
And when traveling, they would not swim at full speed. Reaching twenty kilometers in an hour was already quite a lot.
More importantly, there were wounded members in the group. They could not abandon the wounded, so two Fish-Man soldiers carried one injured person forward, greatly reducing their speed.
As a result, they had only traveled fifteen kilometers in an hour.
Of course, even so, such a speed would leave people on Earth far behind.
The strongest competitive swimmers and channel-crossing swimmers could only cover five kilometers in an hour at full effort.
Xia Qiu swam leisurely behind them. A speed of fifteen kilometers per hour was not fast for him.
After an hour of pursuit, Xia Qiu had also digested Chuu. The heat flow was not as strong as Kuroobi's, but it was still powerful.
With two officers' worth of strength, a body enhanced many times over, and huge pectoral fins working with the force of his