British Airways ethnic liveries was used on Concorde only. By 1999, BA had repainted around 170 aircraft in its new colours but then Chief Executive, Bob Ayling, announced a review of this process. The aircraft already repainted would keep the new designs, but the remainder of the fleet (still showing the pre-1997 union flag design) would receive a variant of Concorde's Union Flag design. The announcement was timed to divert some attention from Virgin's relaunch. A single 747-400 leased from British Airways to Qantas in 2000, registered as VH-NLH whilst operating in Australia, wore a hybrid livery complete with the Denmark "Wings" tail design.
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