Gordon Rocks
Depth is the range from the top of the site to its usual maximum; "recommended cert" is the mainstream-agency level operators usually ask for, not a legal rule. Currents and visibility change daily, so treat everything here as planning ranges.
Gordon Rocks is the best big-animal dive available without boarding a liveaboard: an eroded tuff crater off northeastern Santa Cruz whose rim breaks the surface in three stacks. Inside, the crater floor sits around 32 m; the action concentrates along the rim, where scalloped hammerheads patrol singly or in small schools and eagle rays hold formation against the flow. Sea lions dive-bomb safety stops, turtles wedge into the rock to be cleaned, and the current - the site's engine and its hazard - can shift mid-dive. Locals call it the washing machine without exaggerating much. Day boats run it regularly from Puerto Ayora, making it many divers' first hammerhead encounter.
The moment you come for: Hammerheads on a day trip, eagle rays stacked in current, sea lion buzz-bys
Topography: Submerged volcanic crater rim with sand at depth inside
Current: The eroded crater funnels tide through gaps in the rim - down-currents happen, which is why day boats vet experience.
Know before you splash
Hazards: Down-currents and washing-machine turbulence at the rim gaps; surge near the stacks.
Conservation: Within the Galapagos Marine Reserve; guided groups only.
Nitrox: Worth it here: profiles sit in the range where enriched air meaningfully extends no-stop time (with the training to use it).
Who you'll meet
Galápagos Sea Lion
Scalloped Hammerhead
Spotted Eagle Ray
Green Sea Turtle
Whitetip Reef Shark
Galápagos Shark
Nudibranchs
Blue Shark
Also recorded nearby
"Charted here" species were listed by our editors from the sources on this page. Counts are GBIF occurrence records: observations logged within about 5 km of the charted position since 1990, matched only against the species in our catalogue. They show what has been seen there, not a promise of what you will see.
For photographers
Wide angle: ★★★★☆ · Macro: ★★☆☆☆ (editors' 1–5 rating of what this site gives each style of shooting)