India’s First 3D-Printed Artificial Reefs

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Tamil Nadu will deploy India’s first 3D-printed artificial reef modules to support marine habitat restoration.
This initiative is part of the second phase of the Pradhan Mantri Matsya Sampada Yojana.

The pilot test will place six newly developed reef designs off the Ramanathapuram coast.
Scientists will check how well these modules survive and perform in local coastal conditions before planning a larger rollout.
The ICAR-Central Marine Fisheries Research Institute through its Visakhapatnam Regional Centre is helping with this project.
A Chennai-based startup named Tvasta, which was incubated at IIT Madras, designed and built these structures.
Each module weighs roughly 1 tonne.
Unlike old concrete reefs that use iron inside, these modules do not have iron reinforcement.
They feature complex 3D-printed structures with crevices, folds and attachment surfaces.
This special design helps increase porosity, surface area and habitat suitability for corals and sponges.
The Centre and State are funding this project together in a 60:40 ratio.
This work is part of a bigger artificial reef project spanning 213 sites in Tamil Nadu.
Traditional fishing communities will benefit through improved fish stocks and healthier marine ecosystems.

3D-printed artificial reefs are human-made underwater structures built to restore weak or damaged marine habitats and support biodiversity.
Advanced 3D-printing methods allow engineers to make intricate, customized and species-specific designs that normal concrete cannot match.
These reefs contain varied cavity sizes, folds, textures and complex surfaces that give marine organisms a place to hide and breed.
Their structure encourages corals, sponges, algae, crustaceans and fish to grow and build a new marine ecosystem.
By creating extra habitats and nursery areas, these reefs can increase fish biomass and support sustainable fisheries management.
They offer great flexibility in design, faster changes, site-specific material choices and the ability to target particular marine species.
Their success depends heavily on durability, non-toxic materials, correct placement and long-term checks, because artificial reefs do not always work as planned.
These reefs serve as an innovative tool to strengthen marine biodiversity, help coastal communities and reduce pressure on natural coral reefs.

The government launched the Pradhan Mantri Matsya Sampada Yojana (PMMSY) on 10th September 2020 to bring a Blue Revolution to the fisheries sector.
The main goal is to increase fish production, improve productivity, modernize the value chain, and strengthen post-harvest infrastructure.
The scheme started with a total investment of ₹20,050 crore covering the period from 2020-21 to 2024-25 and now runs up to 2025-26.
It consists of two main parts: a Central Sector Scheme funded fully by the centre, and a Centrally Sponsored Scheme run with state support.
The scheme focuses on boosting production, building fisheries infrastructure, managing post-harvest tasks, and supporting women.
India's fish production reached 195 lakh tonnes in 2024-25 under this scheme.
The scheme also helped create 58 lakh livelihoods and empowered 99,018 women.