The twenty-first episode of the S1 Megafauna Series, because I added a more lot of different living species of sharks and sawsharks and extinct other sharks with scientific names and statuses for this long video.
All shark species ranging from smallest to the biggest.
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 Batoidea (rays and kin).
Some sources extend the term "shark" as an informal category including extinct members of Chondrichthyes (cartila...