Marine Wildlife of the Costa Brava: What You'll See From Your Boat
The Costa Brava hides a fascinating underwater world. Discover what marine species you'll see from your boat and the best snorkeling spots between Blanes and Tossa de Mar.
The Mediterranean may seem like a calm and quiet sea, but beneath its surface lies an extraordinarily rich ecosystem. The Costa Brava, thanks to its rocky bottoms, posidonia seagrass meadows, and clear waters, is one of the best stretches of the Spanish coast for observing marine wildlife. And the best part: much of this biodiversity is visible from a boat or with simple snorkeling goggles. In this guide we'll tell you what species you can find sailing between Blanes and Tossa de Mar, where to look for them, and how to enjoy the underwater world responsibly. Posidonia meadows: the Mediterranean's forest Before talking about animals, we need to talk about posidonia oceánica . These underwater meadows of intense green color are not algae, but marine plants with roots, stems and leaves. They are the underwater equivalent of a forest, and play a fundamental role: - They produce oxygen: One square meter of posidonia generates more oxygen than the same surface area of Amazon rainforest. - They're fish nurseries: Hundreds of species lay their eggs and breed among the posidonia leaves. - They protect the coast: The meadows slow down waves and prevent beach erosion. - They fix CO2: They are carbon sinks that combat climate change. Between Blanes and Lloret you'll find extensive posidonia meadows, especially in front of Cala Bona, Cala Sant Francesc and Santa Cristina beach. From the boat, you'll see them as dark patches on the seabed. These are areas where life thrives. Important: Never anchor over…