Snorkeling in Sferracavallo needs no technical gear: a mask and a snorkel are enough to see the vermetid reef, one of the most unusual coastal formations in the central Mediterranean.
Sferracavallo is a fishing village whose coast is protected by the Capo Gallo – Isola delle Femmine Nature Reserve. East of Punta Barcarello, the coast holds this reef, a small ecosystem that survives with this level of integrity in very few places in the Mediterranean.
What a Vermetid reef is (and why it’s rare?)
A vermetid reef (called a trottoir by Mediterranean biologists, trottoir a vermeti in Italian) is a platform built by small marine snails of the family Vermetidae, also known as worm snails. Here the builder is Dendropoma cristatum, until recently called Dendropoma petraeum. These snails settle on limestone rock at the waterline and, over decades, build real organic platforms. The reefs are typical of the central Mediterranean, and today they are also seen as environmental indicators: their health says something about the state of the sea around them, especially in relation to climate change.
Seen up close from the water, it feels like swimming over living rock that has been at work for centuries, with small fish, sea urchins, algae and a rock texture you will not find anywhere else.
Because it is such a delicate ecosystem, enjoy it with respect. Walk on the reef as little as possible, leave your things inland rather than right at the water’s edge, and if you use fins, take care not to damage the vegetation.
Where and how to go snorkeling in Sferracavallo?
The most interesting stretch of coast begins on the Sferracavallo waterfront (Barcarello), an area easy to reach on foot. You do not need to enter the reserve’s trails: snorkeling here is done directly from the accessible shore. The reef sits right at the waterline and, along the coast, shelters many species of fish and algae. Water shoes can be useful.
At a glance
| Where | Sferracavallo coast, along the Capo Gallo – Isola delle Femmine Reserve, Zone B |
| What to see | Vermetid reef (Dendropoma petraeum), a rare bio-constructed formation in the Mediterranean |
| Gear | Mask, snorkel, optional reef shoes |
| Best time | April–October |
For the bigger picture of the reserve from the Sferracavallo side (access, trails, climbing), see Capo Gallo Nature Reserve: the Sferracavallo entrance. If you prefer to dive with a tank, read Diving in Sferracavallo.
As a biologist, this is the stretch of coast I talk about most enthusiastically with guests who love nature and care about protecting it. You do not need an organized excursion: step into the water from the waterfront and you are looking at an ecosystem that is usually studied in textbooks. If you are planning your stay in Sferracavallo, you will find where to stay and how to get around on the apartment and rooms pages.