Simplify the following text for a Grade 8 native English-speaking person.
Original: The southern elephant seal is found in the Southern Hemisphere on islands such as South Georgia , Macquarie Island , and on the coasts of New Zealand , South Africa , and Argentina in the Peninsula ValdÃ s , which is the fourth largest elephant seal colony in the world .
Simplified: There are two species , one in each hemisphere . The southern elephant seal , is found in Antarctic waters , while the northern elephant seal lives on islands of California and Mexico .