Although the Santa María - La Reforma lagoon complex in the
Gulf of California is one of the most important areas for
shrimp fishery, little is known
about the crustacean species that live in the burrows dug in the bottom.
The zone, which at
about 5,000 square miles (13,000 sq km) is the second largest in the world but still smaller than in previous years, is so named because it contains no oxygen, or too little, at the
Gulf floor to support bottom - dwelling fish and
shrimp.