Gordon Rocks, Santa Cruz: Hammerhead diving in the Galapagos

Gordon Rocks is a dive site shaped by an extinct tuff cone, its surface remnants visible as three rocks. The dive primarily takes place inside the cone's crater, an arena formed by steep outer walls that drop to 60 meters. Below the surface, four distinct pinnacles rise, with three in the northern section connecting to the surface rocks, ranging from 8 to 30 meters. A fourth pinnacle stands centrally within the caldera, its peak at 21 meters and base at 30 meters, structuring the underwater geography and dictating dive profiles.

Approaching Gordon Rocks, you'll feel the current immediately. This site is known for its strong to very strong flow, a characteristic that defines the dive and influences the behavior of the marine life here. The current can be quite technical, requiring attention to detail and sound diving practices. Briefings often include a check of current direction and visibility on arrival, with the dive plan adjusted to conditions, highlighting the dynamic nature of the site and the need for adaptable diving.

The topography of Gordon Rocks, with its underwater pinnacles and crater walls, creates a natural aggregation point for pelagic species. Hammerhead sharks (Sphyrna lewini) are the main draw, often seen schooling in numbers around the pinnacles. These encounters typically involve holding your position against the current, waiting for the schools to move into view, offering a unique perspective on their behavior in a dynamic environment.

Beyond hammerheads, the site is rich with a variety of other large marine life. You can expect to encounter different species of rays, including eagle rays, golden rays, sting rays, marble rays, and mobulas. Various sharks, such as white tip sharks, Galapagos sharks, and blacktip sharks, are also regular visitors. The constant flow of water brings in nutrients, supporting a diverse ecosystem that attracts these larger predators.

The pelagic parade at Gordon Rocks extends to other notable species. Green turtles (Chelonia mydas) navigate the currents, often seen feeding or resting. Schools of tuna and barracudas sweep through, adding to the sense of an active open-ocean environment. Occasionally, the cold season brings sightings of manta rays and sunfish (Mola alexandrini), although these are less frequent and often depend on specific conditions.

Closer to the reef structures, a variety of reef fish find shelter and sustenance. Galapagos grunts, snappers, parrotfish, hogfish, pufferfish, and triggerfish are common. Moray eels are often found within crevices, while surgeonfish, wahoos, jacks, butterfly fish, and banner fish complete a vibrant reef community. Despite the challenging currents, there are opportunities to observe the smaller resident species that thrive in this environment.