Scleractinia spp.
50cm
1-40m
15891 sites
Various
Hard corals, the architects of the underwater world, are the foundation of vibrant coral reefs. These stony corals, belonging to the Scleractinia order, are responsible for building the massive structures that provide shelter and sustenance for countless marine species. As a diver or snorkeller, you'll encounter them in a kaleidoscope of shapes and sizes, from branching staghorn corals to massive boulder corals. Their vibrant colours, often due to symbiotic algae living within their tissues, create breathtaking underwater landscapes. Exploring reefs dominated by hard corals is like entering a bustling city, teeming with life and activity. These corals are most commonly seen in tropical and subtropical waters, typically between 1 and 40 meters deep. Look for them in areas with clear, sunlit water, as they rely on sunlight for photosynthesis. While seemingly stationary, hard corals are actually dynamic living organisms, constantly growing and interacting with their environment. Keep an eye out for the smaller creatures that find refuge within their branches, a testament to their crucial role in the ecosystem. Though their conservation status is vulnerable, the 77 dive sites where these are seen are a reminder of what is worth protecting.
Identifying hard corals can be tricky due to their diversity, but key features include their stony, rigid structure; the presence of individual polyps, which may be visible as small openings or textured surfaces; a wide range of colours, from browns and greens to vibrant pinks and purples; and varied growth forms, such as branching, massive, encrusting, or plate-like shapes. The overall texture and pattern of the coral skeleton are also helpful in differentiating species.
The Hard Coral is listed as vulnerable by the IUCN. When diving, please observe from a distance, avoid touching or feeding, and report any sightings to local marine research organisations.
