The fisheries department in Tamil Nadu has commenced the sinking of 200 artificial reef structures along the East Coast, spanning from Ennore to Akkarai. This ambitious initiative, which began recently, comes with a price tag of ₹4 crore. Each structure, measuring six feet in length and three feet in width, will be submerged at identified locations, positioned five nautical miles from the shoreline, and sunk to a depth of 12 metres using ropes, as confirmed by a senior department official.
These concrete ‘reefs’ are strategically placed to attract fish, with the expectation of fostering fish aggregation over time. Often referred to as fish aggregating devices, these structures aim to enhance marine biodiversity and support the growth of coral colonies. The sinking process is slated for completion within a month, according to departmental sources.
While opinions are divided regarding the efficacy of sinking such substratum beneath the seabed, experts suggest that it may aid in fish aggregation to some extent. However, the long-term impact on fish and faunal diversity remains a subject of debate, as highlighted by a Zoological Survey of India officer.
Formation of artificial reef formations around these structures is another objective, although it’s projected to take approximately 10 years for a full reef to develop. Placing these structures at a distance of 5 nautical miles from the shoreline and at a depth of 12 meters is deemed ideal, ensuring minimal disruption to fishing boat movements, explained the officer.
The initiative signals Tamil Nadu’s commitment to fostering sustainable marine ecosystems and enhancing fishery resources along its coastline. As the project progresses, it is hoped that these artificial ‘reefs’ will contribute significantly to marine biodiversity and support the livelihoods of coastal communities.