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 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 unnamed countryside that is invaded by a flying saucer and its silent, shambling alien occupants. "The Eye Creatures", an Azalea Pictures film, was directed by B-movie director/producer/auteur Larry Buchanan and starred John Ashley. The screenplay was developed by uncredited writers Robert J. Gurney Jr. and Al Martin from the short story "The Cosmic Frame" by Paul W. Fairman (also uncredited). The film was a color remake of the 1957 black and white American International Pictures film "Invasion of the