Fish scale the surface, interacting only with the riblet tips, not causing any high-veloctiy flow in the valleys. Since this high velocity flow now only interacts with the riblet-tip, which is a very small surface area, the momentum transfer which causes drag is now much lower than before, thereby effectively reducing drag. Also, this reduces the cross-stream velocity fluctuations, which aids in momentum transfer too. The rough, sandpaper-like texture of shark and ray skin, coupled with its toughness, has led it to be valued as a source of rawhide leather, called shagreen. One of the many historical applications of shark shagreen was
The Eye Creatures should be no trouble to knock off. "[…]" Get ready to give chase to an injured eye creature; as you can see, he's wearing his Jack Purcell athletic shoes!" Crow even pointed out a shot featuring a common monster-movie goof: "The eye creatures […] were also unfortunate enough to have evolved with heavy-duty zippers running up their backs." Their riffing produced the fan-favorite phrase "They just didn't care," which was later applied to other movies viewed on the show. The Eye Creatures The Eye Creatures (a.k.a. "Attack of Eye Creatures") is a 1965 American made-for-TV science fiction/horror film about an