Aircraft livery Airlines' 1975 livery was among the first Eurowhite schemes outside Europe. The Braniff 1967 livery (see Overal Colour above) was also often dubbed "Jellybean." Jellybean liveries involve multiple alternative colourways in which entire aircraft or parts of them are decorated. A Jellybean variant involved decorating tail fins in different designs, as exemplified by Air India Express, displaying different Indian culture and heritage on its tail, Alaska Air's brand refresh livery, Frontier Airlines with the images of different animals and birds on its tail, JetBlue Airways, Mexicana, Pakistan International Airlines' "ethnic tails," and PLUNA. British Airways’ 1997 ethnic liveries were celebrated
Fish fin in the tail-first direction. As with most fish, the tails of sharks provide thrust, making speed and acceleration dependent on tail shape. Caudal fin shapes vary considerably between shark species, due to their evolution in separate environments. Sharks possess a heterocercal caudal fin in which the dorsal portion is usually noticeably larger than the ventral portion. This is because the shark's vertebral column extends into that dorsal portion, providing a greater surface area for muscle attachment. This allows more efficient locomotion among these negatively buoyant cartilaginous fish. By contrast, most bony fish possess a homocercal caudal fin. Tiger sharks have