Sharks are a group of 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 Elasmobranchii outside the Selachimorpha, such as Cladoselache and Xenacanthus. Under this broader definition, the earliest known sharks date from more than 420 million years ago.
We’ve been telling you on and on – millions and millions of sharks are perishing each year, mostly due to shark finning – people fish sharks, cut off their fins, them let them go, only to suffer a slow, painful, humiliating death, unable to move at the bottom of the ocean. Shark fin soup is [...]
Sharks are the ultimate predators, comfortably sitting at the very top of the food chain; but even they have their enemies (the biggest one being us, of course), especially when they’re small – nobody fears a small shark. But even in their defenseless period, sharks have managed to find a way to adapt. Australian researchers [...]
Sharks are in a dire position right now, with their numbers decreasing by the millions each year. However, conservationists failed to win new protections for threatened sharks in the Atlantic Ocean at the annual meeting of a major international fisheries commission; they still have hope for following years though, because for the first time, the [...]
Would you eat shark fin soup? Please, tell me that the answer is ‘NO!’. Nearly a third of all shark species are endangered, due to wreckless killing – mostly for soup. Proceed at will, but the article contains some gruesome pictures. The champions’s tragedy Sharks are on top of the food chain – they have [...]