Punta Vicente Roca

Pangas drop divers at the base of a sloping wall on Isabela's northwestern point, right where Ecuador Volcano's collapsed rim meets the sea and the seahorse-shaped island narrows to what liveaboard crews call its mouth. The current here can run hard enough that the standard entry is negative and quick — clear your ears and head straight down onto the rock rather than pausing on the surface. A shallow band of crevices near the top of the wall gives way to a steeper drop that continues well past recreational depths, though most of the diving and most of the sightings happen in the first 25 metres or so.

The cold is the point. Isabela and Fernandina sit in the path of the Cromwell Current, an equatorial undercurrent that wells up here more than almost anywhere else in the archipelago, and the water can fall into the mid-teens Celsius on the equator. That upwelling is what pulls mola mola in against the wall — genuinely unpredictable, but reported here more consistently than anywhere else in Galápagos — alongside Galápagos penguins and sea lions that drop down from the surface to look divers over at close range.

The sand at the base of the wall, around 18 to 22 metres, is worth a slow pass with a torch: red-lipped batfish walk across it on stubby, leg-like fins, and the nocturnal, endemic Galápagos bullhead shark rests there by day, small and blotchy enough to miss if you are not looking down. Frogfish and seahorses tuck into the wall's crevices above, and schools of barracuda and salema move through the water column. Orcas are occasionally reported working the site — mola mola is a documented prey item for them here — though a sighting is luck rather than something to plan around.