Coral Reefs In UV Light

• Barrier reef – reef separated from a mainland or island shore by a deep channel or lagoon
• Atoll reef – more or less circular or continuous barrier reef extends all the way around a lagoon without a central island
Other reef types or variants are:
• Patch reef – common, isolated, comparatively small reef outcrop, usually within a lagoon or embayment, often circular and surrounded by sand or seagrass