Richard Corben - In Deep (1976 Heavy Metal)

here's a classic Richard Corben short from Creepy #83 (october 1976), written by Jan Strnad.  Corben (1940 American) is peerless, possessing one of the most electrifying art styles in the history of comics.  his balance of photorealism with a warped cartooniness is totally unique, and his color sense is impeccable. this is considered one of his best works from his Heavy Metal days.  originally there was a black and white prologue, but i cannot find it anywhere, so any help would be appreciated.  and i'm not sure if i've ever figured out why the epilogue is monochromatic red.

for more info on corben, here is his website.