He removed his pants and undies, and sat, stark naked on the deck.
suddenly, with a sudden pop!
his feet became webbed!
on his feet his toes had webbing in between,
and his toenails were nowhere to be seen.
"I must be the very first fisherman in the world to have webbed feet!" Johnny said.
just then, his hands soon became webbed like his feet.
then, Johnny felt 3 huge cuts open on his neck. he had gained gills!
he started gasping, with an impending doom of choking to death. He dove into the ocean. He felt relieved to be breathing.
The size of his feet suddenly caught his attention, and reaching for them found they were flippers, like a frog's. He hardly noticed his ankles were no longer present, and the flippers were parallel with his legs, for he felt a pang, then a tightness, in his thighs. Turning his attention he saw that his legs now joined halfway down his thighs, hiding his genitals.
Refocusing his attention on his feet, he found that he could not longer reach them, his legs were now considerably longer. The feet themselves were not frog-like either anymore, the smallest, outward toes were now the longest, and stretched the membrane between them and the other toes further. While he watched, individual toes faded away, leaving only the webbing surrounded on the outer parts by flesh.
Trying to move, he noticed the joints of his knees were no longer definite, and bent in any direction he chose. The separation between his legs continued to close like a zipper and merge into a single column.
Hundreds of goose bumps bulged on the skin of his legs, flattened, and pressed together, forming rough ridges. The scales mostly retained the old skin color, though they were tinted slightly blue.
It then occurred to Johnny that for several minutes now he had been breathing freely, although he was still underwater. Nevertheless, he swam for the surface, was relieved to find the torrents were gone, and once again gasped air. He cautiously opened his wet eyes and discovered he was all the time submerged in only five feet of water, in that little harbor surrounded by the dock.
He dragged himself onto some sand to inspect his recent changes under the light of the sun. For the first time he saw his modified legs all at once. For the first time it shocked him to discover that they were a fish's tail.
After a quick inspection he found that the upper portion of his body was unchanged.
"I'm a merman!" Johnny said.