Mexican biologist discovers new shark species 31 minutes ago MEXICO CITY (Reuters) - A Mexican marine biologist has discovered a new shark species in the murky depths of Mexico's Sea of Cortez, the first new shark find in the wildlife-rich inlet in 34 years. Postgraduate student Juan Carlos Perez was on a fishing boat in early 2003 studying sharks from the Mustelus family netted at depths of 660 feet when he noticed some of them had darker skin and white markings. The sharks, slender, dark gray-brown and around 5 feet (1.5 meters) long, turned out to be a new species...