Darwin’s Arch is a hotspot where sharks, turtles, and mackerels gather at cleaning stations, benefiting from a symbiotic relationship with butterflyfish, barber fish, and angelfish. The sandy slope in front of the arch, called "El Arenal," is the busiest area, perfect for spotting hammerhead sharks, Pacific green turtles, and the occasional hawksbill turtle, along with garden eels and starfish. Beyond, sloping terraces lead to a deep ravine with curved reef contours, offering excellent spots to watch hammerheads. Just 100 meters from Darwin’s Theatre, this area also provides opportunities to swim with whale sharks and enjoy the marine life carried by the current.
Darwin’s Arch is one of the most iconic landmarks in the Galapagos, but only a few travelers have the chance to see it in person. However, the true marvel lies beneath the waves, where the reef platform hosts a world-class diving experience. This underwater paradise is a hotspot for schools of scalloped hammerhead sharks and, most notably, whale sharks—the largest fish in the world, reaching the size of a bus. Divers can get remarkably close to these gentle giants, particularly between June and November. During this period, pregnant whale sharks often stop here on their mysterious migration, accompanied only by remora fish.