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
Creatures from the Abyss secret laboratory studying mutated fish results of radioactive plankton. One of the specimens escaped killed the whole crew and preys on the unsuspecting teenagers. Reviews for "Creatures from the Abyss" are mixed to negative. On Rotten tomatoes it has an audience score of 25%. On IMDb it has a rating of 4,6/10. The movie review website, "b-movies.gr" gave the film a score of 4/5 and said that the film is a must for sea monster fans. Shriek Studio released "Creatures from the Abyss" on 31 July 2007 as part of the "Mutant Monsters Triple Feature" along with "The Dark" and