The youth named the bloodline he had previously collected the Blue Scale Bloodline. The peak of this bloodline was only Bronze.
After slaying the old Fishman and collecting his bloodline, he named it Brown Scale. The grade of this bloodline reached Black Iron, which meant that a Fishman with a complete bloodline could potentially cultivate to the Black Iron level. However, any progress beyond that was basically hopeless.
The Fishman youth was elated in his heart.
Of course, the higher the Fishman bloodline, the better.
Since his current cultivation was at the Silver level, there was a significant flaw in disguising himself as a Blue Scale Fishman—
Once he used the Silver Fighting Spirit, it would expose his disguise.
It was like a person who did not have wings suddenly being able to fly.
The old Fishman Zong Ge and his new companion hadn't seen through the Fishman youth's disguise because the latter carried Pearl Bubble with him.