As with Davy Jones' other crewmen, Koleniko had gradually taken on characteristics of various sea creatures. Most notable of these aquatic deformities was that the right side of his face and left shoulder had been fused with the spines of a pufferfish, and would inflate and deflate with his breathing. His eye had transformed into a bloated fish eye that served him well when navigating by the stars. Holes and pock-marks covered the right-hand side of his face, accentuating Koleniko's inhuman appearance. His left hand was bloated, giving the appearance of a fin, and his poncho appeared to be coated with, or may have been entirely comprised of, seagrass.
After Davy Jones was killed, he along with other crewmembers returned to their human form.