We’ll see gray reef sharks – 99 guaranteed!” says our dive guide Justifer as we descend to the reef. Diving in Providencia means immersing yourself in the world of sharks. They approach us curiously and eye us up. One reason for their trusting nature is that the local islanders feed the sharks with lionfish, which have spread invasively here and threaten the other underwater inhabitants. During several dives, we are enchanted by the elegance, curiosity and speed of the sharks.