Situated close to Mismaloya in the Bay of Banderas is Los Arcos, the most well known Scuba and snorkeling destination in Puerto Vallarta. In a marine park with a few little islands and many reefs and passages, this is an area overflowing with marine life. While in the area, it is a must to dive the 800-foot "Devil’s Jaw," underwater cliff, and see a wide assortment of ocean life, such as, puffer fish, angel fish, lobster, clown fish, needle fish, and of course Eagle Rays and octopus, but this is just a small portion of the active marine life that you will be privy to.
The bay of Majahuitas, is another popular dive where the Sierra Madre Mountains can be seen descending into the ocean with rough shores that attract various marine life. Although Los Arcos is known as the deepest water depths in the Vallarta vicinity, Majahuitas is a shallow plunge where spotted rays, tropical fish and moray eels are regular sightings.
Diving Los Arcos can be done at night as well which opens up a whole new perspective for advanced divers. For this reason and also because of its depths, Los Arcos is great for both advanced and beginning divers under more limited conditions.