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

"Go get the leather net and then follow me!" Chu Xian shouted behind him and then jumped into the water.

With a series of splashes, Sword Two and the others followed closely behind, each of the mermen holding a leather net in their hands.

Chu Xian checked the position of the sea snake, and with a thought turned into a fish.

His fish form was now a huge creature over four meters long with a snake like body that caused layers of waves as he pushed forward in the upper sea layer.

A sea snake about 1.5 meters long appeared in the distance; its upper body was grey, and he could clearly see a golden glow from his god's eye view. Sea snakes did not count as fish, so he could not use Rule on it, and so he directly rushed forward and grabbed it with the arms on his head.

Catching Sea Snakes