Lobsters, crayfish, conger eels, moray eels, catsharks. Asturias: 20th-century war wrecks, gorgonians. Txingudi ideal for beginners, Bajo Machichaco demanding at 30+ m. Water temperature 14-18°C in summer. Extraordinary nudibranchs.
The Cantabrian coast is one of the most underrated diving destinations in Spain. The cold northern waters offer variable visibility but remarkable biological richness, with abundant seaweed meadows, echinoderms, and Atlantic fauna that are hard to find in the Mediterranean. The water temperature (between 12 and 18 °C depending on the season) requires a drysuit or semi-dry suit, which raises the entry threshold for beginners but guarantees uncrowded environments.
Characteristic fauna includes large lobsters, common lobsters, conger eels, moray eels, catsharks, groupers, octopuses, and an extraordinary diversity of nudibranchs and sponges. Asturias stands out for its wrecks — the coastline concentrates dozens of sunken ships from the wars of the twentieth century — and for rocky seabeds carpeted with gorgonians. Txingudi Bay in the Basque Country is ideal for beginners, while the Bajo Machichaco reef off Bermeo is one of the most demanding and spectacular dive sites in the north of the peninsula, with walls descending to more than 30 meters.