Orca Killer Whale Shark Imperforated Sov. Sheet of 4 Stamps MNH Transportation stamps Most life forms evolved initially

Most life forms evolved initially in marine habitats

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are the Primates (apes

such as Pablo Picasso and Henri Matisse

Orca Killer Whale Shark Imperforated Sov. Sheet of 4 Stamps MNH Transportation stamps Most life forms evolved initiallyBurundi Orca Killer Whale Shark Imperforated Sov. Sheet of 4 Stamps MNH 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