Little Fish Eats Dragon Meat

A chance to change, challenge destiny, make dreams a reality, and live a legend! A regular man gains a system that allows him to turn into a fish! 
In the modern world, a young man gains an unconventional system that gives him the power to transform into a fish! With this strange power, he shoots for the stars!

Caron_

I Can Turn into a Fish

Aristophaneso

After calming down the excited old man, Chu Xian looked at the cute Pupu with crystalline tears in her eyes and he tousled her hair.

"Let's go back. It's almost noon, and we can grab some food!" Chu Xian said.

"En." Pupu wiped her tears and nodded. Grandpa Feng breathed out a sigh of relief, and a grateful smile crossed his face.

"Eh?" Just as Chu Xian turned to leave, he noticed some fish on the dock.

This species was very peculiar, and it had a yellow body and black stripes with a head larger than the body. Chu Xian instinctively used his system's identification power.

"This…" Chu Xian's pupils dilated. "It has more than five hundred energy? This palm-sized fish? And it even has a sonar ability - amazing."

Sonar Fish