Stock Photo: Postcard of Parexocoetus Brachypterus Fish. ca. 1914, 251. Malolo Puhiki'i (Parexocoetus Brachypterus). FISHES OF HAWAII. The Aquarium at Waikiki, Honolulu, claims the rarest and most beautiful fish in the world. They are odd in shape having all the hues of the rainbow with the tints laid on as if with the brush. No painter can imitate them nor language do them justice. Words are inadequate to accurately portray these exquisite colors and weird shapes.