The other ships were unfortunate, many of them were flung out of the whirlpool during the struggle of the Octopus King, and were crushed into pieces mid-air by the infuriated Octopus King.
Mu You had no time to worry about others, he hurried back onto the small boat, accelerating his escape.
The Octopus King, after its struggle, was flung out of the whirlpool, landing outside. But it immediately launched an attack on the merpeople who dared to ruin its plans.
Mu You was initially a bit concerned about the safety of the merpeople, but realized he was overthinking. The merpeople were far more nimble than imagined, they promptly slipped away after they had accomplished their task.
In terms of swimming, the merpeople were truly the strongest in the sea. Even the Octopus King could not catch up with their trail in the water.