Raymond 'Red' Reddington in “Unfinished Business”

In Mexico, there are these fish that have colonized the freshwater caves along Sierra del Abra. They were lost. They found themselves living in complete darkness. But they didn't die. Instead, they thrived. They adapted. They lost their pigmentation, their sight, eventually even their eyes. With survival, they became hideous. I've rarely thought about what I once was. But I wonder if a ray of light were to make it into the cave, would I be able to see it? Or feel it? Would I gravitate to its warmth? And if I did, would I become less hideous?