sharks Wallpaper

Sharks are a group (superordo Selachimorpha) fish with cartilage skeletons were complete [1] and a slender body. They breathe using gills hole five (sometimes six or seven, depending on the species) in addition to, or starts a little behind, her head. Sharks have a body covered with skin dermal denticles to protect their skin from damage, of parasites, and to add to the dynamics of the water. [1] They have multiple rows of teeth can be replaced.