Marine science instructor discovered the 18-foot oarfish while snorkeling . The oarfish, which is native to South America, was first spotted in a remote area of Peru by marine biologist and expedition leader Dr. David Barclay. It is unclear why the oarfish was discovered in shallow water . The discovery could lead to finding out more about the fish .
Marine science instructor discovered the 18-foot oarfish while snorkeling . Oarfish usually live in the deep sea , marine scientists say . It is unclear why the oarfish was discovered in shallow water . The discovery could lead to finding out more about the fish .