Tranøy means "crane" and the last element is "øy" which means "island". Prior to 1909, the name was written "Tranø". The coat of arms is from modern times; they were granted on 15 May 1987. The arms are silver or white with a black Atlantic halibut "(Hippoglossus hippoglossus)" in the center. The fish is a main species of local fish, which symbolizes the importance of fishing for the local community. In addition to this, the fish played a major role in local legends, similar to the role of bears in land-based legends. The Church of Norway has one parish "(sokn)" within
Fish anatomy Their retinas generally have both rod cells and cone cells (for scotopic and photopic vision), and most species have colour vision. Some fish can see ultraviolet and some can see polarized light. Amongst jawless fish, the lamprey has well-developed eyes, while the hagfish has only primitive eyespots. The ancestors of modern hagfish, thought to be the protovertebrate were evidently pushed to very deep, dark waters, where they were less vulnerable to sighted predators, and where it is advantageous to have a convex eye-spot, which gathers more light than a flat or concave one. Unlike humans, fish normally adjust focus by