The Rosario Islands Oceanarium is a natural aquarium located on San Martín de Pajarales Island. Unlike conventional aquariums, this facility uses the natural waters of the Caribbean Sea to keep species in an environment as close to their natural habitat as possible.

The Oceanarium is home to an impressive variety of marine species from the Colombian Caribbean, including sharks, sea turtles, dolphins, multicolored fish, rays, and many other fascinating creatures. Visitors can enjoy educational exhibits and dolphin shows that combine entertainment with marine conservation awareness.

This marine center also participates in conservation, rehabilitation, and environmental education programs, contributing to the protection of the region's marine ecosystems. It's a must-see for families and marine wildlife lovers visiting the Rosario Islands.