Small Group Snorkeling in Los Arcos, Puerto Vallarta

This small-group snorkeling outing in Los Arcos, off Puerto Vallarta, is built around one idea: you don't need to breathe underwater to get a good look at what lives there. With snorkeling gear, a guide and a relaxed pace, you spend part of the morning or afternoon exploring the marine environment of the area. The activity lasts about 240 minutes in total.

Your guide is Thalia, a marine biologist who leads the group. Her role goes beyond pointing out fish: she explains how the underwater environment works, advises you about the species you are likely to see, and makes sure everyone in the group enjoys the activity safely. She is also a certified lifeguard, which is useful to know if you are a bit nervous about open water.

Snorkeling equipment is included, so you don't need to bring your own. The price also covers bottled water, soft beverages and snacks, which you can enjoy between time in the water. A full lunch is not part of the tour, and alcoholic drinks are available to purchase on board if you want one.

The tour suits people who want a guided introduction to the sea rather than a self-directed swim. Travelers should have at least a moderate level of physical fitness, and it is not recommended for anyone with poor cardiovascular health. Children must be accompanied by an adult, and infants sit on an adult's lap. The child rate applies only when a child shares with two paying adults.

Some practical points to plan around. Bring a swimsuit, towel, biodegradable sunscreen, a hat or cap and sunglasses; the suggested dress code is smart casual. If you are traveling with children or infants, carry a birth certificate or a passport copy, since valid proof of birth date is requested when you meet the guide. Let the operator know about any medical condition.

Also note that a minimum of five people applies. If that number is not reached, the tour can be cancelled even after confirmation, in which case you are offered an alternative or a full refund. Gratuities, hotel pickup and drop-off, and transportation to and from the attractions are not included, and there is a port fee at Marina Vallarta that is paid separately.