Other shark characteristics include using their gills to extract oxygen from the water, rather than breathing air. Unusual for non-mammals, whale sharks give birth to their young live instead of ...

A closer look at what defines a shark. Sharks and rays come from one big family that evolved over 400 million years ago. Today they come in a variety of shapes and sizes. But with 510 species of ...

Once processed, however, visual characteristics that allow for species identification ... Peer J Life & Environment, 2024) examined shark fins acquired from seafood and traditional medicine shops in ...