Whale sharks are the largest fish in the ocean, and the Galápagos is one of the more reliable places in the world to swim alongside one — guests can encounter them through much of the year, both diving and snorkeling, thanks to the nutrient-rich waters surrounding the islands that draw the animals in to feed.
There's a firm rule that shapes every encounter: a minimum distance of 3 meters must be kept from the sharks at all times. It's not a suggestion — it's the baseline that makes the experience sustainable for the animals rather than disruptive, and it applies whether a guest is on a Shark Conservation Expedition (on Aqua or on Galaxy Diver II).
What separates this from an ordinary wildlife encounter is what happens to the sighting afterward. Guests aren't just observers — they function as citizen scientists, and their observations feed into research on whale shark migration patterns, feeding habits and breeding grounds. A photograph taken in the water during an expedition can become a genuine data point in an ongoing research effort, not just a souvenir.
It's worth being honest that not every trip is a scuba trip — GSD has fielded interest from travelers who want a shorter, non-scuba swim-and-snorkel option specifically to see whale sharks, which speaks to how much the animal itself, rather than diving as an activity, is the draw for a lot of visitors.
Source: adapted from Galápagos Shark Diving's own published article on the experience of swimming with whale sharks.