Manta Rays

1. Robs Underwater Photos (off the coast of La Paz, Mexico)

2. Manta Rays of Mexico's Pacific

Scuba Diving

1. History of Scuba Diving

2. Diving in the United States Navy

Giant Clams

1. USGS - Giant Clams#1

2. USGS - Giant Clams#2

3. Lagoon Farming of Giant Clams

4. Giant Clams in the Cook Islands

La Paz, Mexico

1. La Paz General History

Black Pearls

1. The Complete History of Pearls in Mexico