4. Dusky shark
In at number four, one of the largest of its genus, dusky sharks have a slender, streamlined body and their eyes are equipped with protective third eyelids. But sadly, they too are being endangered by a bowl of soup. Dusky sharks are now so depleted that scientists at the National Marine Fisheries Service estimate it could take from 100 to 400 years to rebuild their populations.
Image Credit: shishihenge via flickr