Los Arcos is a marine reserve located in Banderas Bay, near Puerto Vallarta, Mexico. It is a popular destination for scuba diving and snorkeling due to its abundance of marine life and its clear water. The reserve is made up of several small islands and rock formations, which provide habitat for a variety of fish, invertebrates, and other marine animals. Some of the most common marine life seen at Los Arcos include angelfish, butterflyfish, parrotfish, sea turtles, and rays. Marine life: Angelfish Butterflyfish Parrotfish Sea turtles Rays Manta rays Dolphins Humpback whales (during the winter months)