At Minos' words, the colorful fish changed its gaze, feeling that it could use the help of this human to take revenge for the death of its children.
It alone knew eliminating this dark-scaled serpent would be extremely difficult. But if it had help from this human, even more, if it fought outside the sea, its chances would be better.
Alone it wouldn't have many advantages fighting outside the sea, and more, it wouldn't be able to force its opponent to fight in that space.
But fighting in the air, it would have a slight advantage over that serpent, which had its locomotion more difficult in the air.
So seeing its possibility of victory increasing with the appearance of Minos, that fish soon changed its shape to its humanoid one so that it could breathe in the air. Meanwhile, it floated close to the human.