Johnny immediately discovered that he could no longer turn his head around, but he knew one thing was for sure and absolute positive - his piscine changes were drawing to a close.
His huge flippery feet began to fuse, starting at the heel and working their way outwards as his legs became unable to separate. His legs became a single connected mass, and the shimmering scales rippled down it's length, cementing their fate. The flippers finished their transition into a flattened tailfin, taking with them his last chance of being able to stand up again.
'Goodbye, human life. Hello, aquatic marine life.' Johnny thought, consigning himself to his fate.
As his fishy scales crept up his face, he felt a numb, tense, swelling sensation. His face began to change shape; with the jaw strengthening and expanding, leaving him with a huge piscine underbite, his beard receding as it swelled up, almost as if he had no facial hair at all.
Johnny felt his arms shrinking into his torso, which by now was changing into a more fish-like shape, leaving the fins on his body.
Then, Johnny saw his nose shrink, right before his eyes, just as they pushed out to the sides of his head. He felt his hair receding, like his beard had before. Immediately, to finish it off, his ears changed into his new gills.
Gasping, Johnny felt the painful sting of air drying them out. He was soon distracted by this as his vision began to warp and alter, and his mind was plunged into a state of cold, yet placid numbness.
Instinctively, he wriggled and slid into the now inviting and awaiting water; his transformation completed.