Review and images by JimoAi; edited by bmathison1972
Sharks are master hunters. They have inhabited the world’s oceans since the Silurian period and are still standing strong today, even though their population is dwindling due to human greed. They have a basic body plan of a streamlined body, having cartilage rather than bone for their skeletal structure, external gill slits on either sides of the head, and pectoral fins that are not fused to the head.