Aquarium Cap Blanc, Marine conservation center in Sant Antoni de Portmany, Spain.
Aquarium Cap Blanc is a natural cave with an underground freshwater lake located along the coast of Sant Antoni de Portmany on Ibiza. The water fills a limestone basin where Mediterranean fish species live in their original habitat surrounded by rock walls.
The cave formed through natural geological processes over millions of years as a limestone formation. Local fishermen once used it as a storage place for their daily catch before it was later converted into a conservation facility.
The name refers to a white limestone cliff that defines this stretch of coastline. Today, visitors can observe how water fills the natural chamber, creating a living space where fish move freely in their everyday surroundings.
The location can be reached on foot along the coastal path or by boat from Sant Antoni harbor. Visitors should know that the cave maintains steady conditions year-round, so simple clothing works well for a visit.
The center focuses on treating sea turtles that are found injured along Ibiza's shoreline. After they recover, the animals are returned to the Mediterranean Sea.
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