Leucism
From Microcosm Aquarium Explorer
Leucism (pronounced loo-kism) is a genetic condition in which an animal displays reduced skin or scale pigmentation. Unlike albinos, leucistic (loo-kiss-tic) animals have normally colored eyes, while true albinos have pink eyes. Leucistic fishes may be white or a very pale pink. See Convict Cichlid.
In medical references and literature, these terms may be spelled with a k (leukism and leukistic), deriving from the Greek leukos for white.