(Building) a trademark name for plasterboard or drywall, composed of gypsum enclosed by heavy sheets of paper and used for constructing interior walls and ceilings. (ËÊitËrÉk) Trademark. a brand name for a plasterboard of gypsum between paper.
If we go by the official list of dangerous sharks (e.g. from the International Shark Attack File ISAF, an institution which analyzes and collects reports on shark attacks) the white shark (Carcharodon carcharias) ranks first, followed by the tiger shark (Galeocerdo cuvier) and the bull shark (Carcharhinus leucas).
Sharks-Not Dangerous Unless You Feed Them. One of the most common sharks found on reefs is the Nurse Shark. These shy sharks behave a bit like ostriches -- they will poke their heads in the reef in attempt to hide from divers. They seem to think that if they can't see you, you can't see them!.