Shark wallpapers hd images for desktop backgrounds. Beautiful Shark pictures and photos download free for screensaver in widescreen. We provide the animals photography for different devices in high resolution. Presently you can inquiry or view extremely wonderful feathered creatures wallpaper 3d from world’s most delightful fledglings pictures free download and can offering to your companions by social website Facebook, Twitter, Tumblr, Google+ and Whatsapp. We surfed all over cyber world daily and select the best collection of HD wallpapers for free in different size and resolutions. We upload a lot of wallpapers and images in every post where these wallpapers for desktop are absolutely free to download and available in high definition for your desktop pc, laptop, tablet, android and smartphone. Please check our widescreen HD photos and bring beauty to your desktop. Free to upload all the photos you want from smartphone, tablet, laptop or desktop computer and spend more time enjoying them. We provide legal copyright owners with the ability to self-publish on the internet by uploading, storing and displaying various media utilizing our services. The photo(s) you’re going to upload should not infringe the copyright of anyone else. To save this wallpaper or save this image as wallpaper background on your desktop in widescreen, first you click on the each wallpaper or image to view larger in light box (zoom size) on your screen, then right click on image and select the option “save image as…” to download to your desktop, laptop. If you are browsing website by mobile device, please tap on image for a while (3 seconds) and then select “save image as …” to download image to your mobile device.
Sharks are a group of fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachimorpha (or Selachii) and are the sister group to the rays. However, the term “shark” has also been used for extinct members of the subclass Elasmobranchii outside the Selachimorpha, such as Cladoselache and Xenacanthus, as well as other Chondrichthyes such as the holocephalid eugenedontidans. Under this broader definition, the earliest known sharks date back to more than 420 million years ago. Acanthodians are often referred to as “spiny sharks”; though they are not part of Chondrichthyes proper, they are a paraphyletic assemblage leading to cartilaginous fish as a whole.
Since then, sharks have diversified into over 500 species. They range in size from the small dwarf lanternshark (Etmopterus perryi), a deep sea species of only 17 centimetres (6.7 in) in length, to the whale shark (Rhincodon typus), the largest fish in the world, which reaches approximately 12 metres (40 ft) in length. Sharks are found in all seas and are common to depths of 2,000 metres (6,600 ft). They generally do not live in freshwater although there are a few known exceptions, such as the bull shark and the river shark, which can survive and be found in both seawater and freshwater. Sharks have a covering of dermal denticles that protects their skin from damage and parasites in addition to improving their fluid dynamics. They have numerous sets of replaceable teeth.