Malawi Shark Fish Ocean Fauna Marine Life Souvenir Sheet of 4 Stamps Mint NH Hunchback Comoros Fauna Famous Birds Darters

Comoros Fauna Famous Birds Darters Sov

Soviet Union Marshals Konstantin Ksawerowicz Rokossovky Imperforated Sov

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Malawi Shark Fish Ocean Fauna Marine Life Souvenir Sheet of 4 Stamps Mint NH Hunchback Comoros Fauna Famous Birds DartersMalawi Shark Fish Ocean Fauna Marine Life Souvenir Sheet of 4 Stamps Mint NH Sharks are a group of elasmobranch 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