We observed that red eyes in koi were darker than the eyes of typical albino fish in other fish species. In this case the red color of the eyes was clearly visible only at certain light angles.Click to see full answer. Likewise, what do the colors of a koi fish mean?A red or orange koi is a symbol for the mother of the family, and a red or pink koi is a symbol for a daughter. Red koi can also symbolize power and bravery, both common associations with the color red. Black symbolizes great adversity, the black koi fish is used to represent adverse struggle to succeed.Also, what does a koi fish look like? Koi may just look like an oversized goldfish, but they’re not even remotely related. Koi are actually a type of carp, and today they’re some of the most expensive pet fish in the world. For example, there are koi with light blue spots, ones with large red patches on their backs, or all-metallic gold. Herein, do koi fish have eyelids? Koi do not sleep in the same way as humans. They are unable to close their eyes because they do not have eyelids and, as far as it is possible to tell, neither do they dream.Do Koi change color as they grow?Many people are attracted to young koi as they often look extra vibrant and colourful, but the color you see is by no means a life-time guarantee. As koi grow they’ll change color and pattern, and some may go from patchy all over to totally one tone (often white) after a few years.