The turquoise blue waters of the Indian Ocean spread along the coastline of Zanzibar. However, visiting the Blue Lagoon is much more than an incredible exploration of tropical fish and reefs. It is a place where you can swim with hundreds of fish and enjoy the diversity of underwater life. The Blue Lagoon excursion is tide-dependent, low tide is usually better for sight as its calm waters enhance the visibility of corals and fish, and also allow for an enjoyable swim!