Torre Ferrer

Torre Ferrer's porous rock announces itself immediately — the ridge is wider than most Maresme formations, and every surface is textured with holes, grooves, and narrow fissures. Rather than following the ridge lengthwise, the strategy here is to hover over a section and work it at close range. Sweep a torch across the rock face and check each depression: nudibranchs colonise the surfaces between crevices, their colours vivid against the dark substrate. Flatworms — thinner, flatter, often overlooked — glide across the same rock. The porous structure means even a small patch of ridge contains dozens of potential finds, and the 16-19 metre depth gives generous bottom time to be thorough.

It is the small life here that catches your attention most. Where other Maresme ridges are known for their morays, lobsters, or rocky architecture, Torre Ferrer is defined by nudibranchs and flatworms — species most divers swim past without registering. The porous rock creates the right substrate in the right quantity. The ridge's unusual width compounds the effect, offering more explorable surface per dive than a narrow formation would. This is a site that rewards lens-to-rock diving: the closer you look, the more appears.

A torch is essential, not optional. The porous rock is full of recesses that stay shadowed even at midday, and the nudibranchs and flatworms that define this site often sit inside them. A macro lens or close-up diopter will make the most of what Torre Ferrer offers — wide-angle gear misses the point entirely. At 16-19 metres, Nitrox is unnecessary and bottom time is generous on air. Both Blaumar (Port Mataró) and Niman Sub (Port Balís) include Torre Ferrer on their dive calendars. Conditions and visibility data specific to this site are limited in available sources, so confirm with the centre before booking.