SELACHII World of Evolution 1 Oz Silver Coin 1000 Francs Burkina Faso 2016. This incredible new Silver coin is the second issue of the World of Evolution series and presents the most feared creatures of the seas, the Sharks (Selachii).The coin has an Antique Finish quality, 1 Ounce weight and a frightening yet amazing Shark tooth insert. This special coin is housed in a beautiful case, accompanied by the Certificate of Authenticity. Limited mintage to only 500 pcs. The reverse of the coin features a real Shark tooth insert, in sensational high-relief, with a spectacular background that looks like an archaeological excavation. On the top of the reverse, the inscription: WORLD OF EVOLUTION the name of the series. On the bottom of the reverse, the inscriptions: SELACHII the name of the coin and 2016 the issue year. On the right side, the inscription: 1OZ AG 0.999 the weight and the fineness of Silver. The obverse of the coin depicts the Coat of Arms of Burkina Faso and the inscriptions: REPUBLIQUE DU BURKINA FASO the issue country and 1000 FFRANCS CFA the face value.
Selachimorpha 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. Well-known species such as the great white shark, tiger shark, blue shark, mako shark, and the hammerhead shark are apex predatorsorganisms at the top of their underwater food chain.Many shark populations are threatened by human activities. The item "SELACHII World of Evolution 1 Oz Silver Coin 1000 Francs Burkina Faso 2016" is in sale since Tuesday, March 06, 2018. This item is in the category "Coins & Paper Money\Coins\ Canada\Commemorative". The seller is "1fabe1" and is located in Roscoe, Illinois. This item can be shipped to United States.