A new study by the Ocean University of Sri Lanka has found that the artificial reef at Hambantota International Port (HIP) now hosts the highest diversity of reef fish in southern Sri Lanka, surpassing natural sites like Weligama, Polhena, and Thalaramba.
Using standard survey methods, researchers recorded a Shannon-Weiner Diversity Index of 2.3 at HIP—compared to 1.8 at Weligama and just 1.1 at Thalaramba. More than eight species were found unique to HIP’s bay, including the Blue Green Chromis and Redfin Butterflyfish, alongside commercially valuable trevallies, emperors, and lobsters.
Scientists attribute the reef’s success to a strong trophic balance, with abundant herbivorous fish keeping algae in check and allowing coral cover of 30–35% to thrive. Minimal human disturbance, clean water flow, and the port’s semi-artificial structures have further enhanced habitat complexity.
“This reef is a model for how coastal infrastructure can double as a thriving ecosystem,” said Dr. M.F.M. Fairoz, who led the study.
The findings highlight HIP’s potential role not only in supporting fisheries but also as a site for eco-tourism and marine education. Researchers stress the importance of long-term monitoring to safeguard the reef, which they say could inspire more eco-conscious development projects worldwide.
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