What will I see in the Reef Lagoon? The Reef Lagoon or reef flat can be entirely enclosed creating a stretch of quiet water or it can be a protective area bordering a beach, or a flat, rocky area between the reef and the shore. Whatever its character the lagoon offers protection to juvenile and small fishes. Consequently, the number of species living there is often the highest of any reef zone. Stretching from the beach to reef crest, the lagoon's sandy bottom is littered with chunks of coral. As one swims towards the crest the flat area becomes more rocky and the number of browsing fishes higher. You will spot juvenile sharks and rays, Black-spotted Pompanos, juvenile Triggerfishes, a large variety of Goatfishes, Sandperches, Monacle Breams and the occasional school of Mullets.