Coral Net™

Innovative Method Different from Conventional Approaches

Function of Coral Net as a platform for coral reef rehabilitation

Coral Net actively proliferates calcareous algae, promoting the settlement of coral larvae.

Previous Achievement of Coral Net (Okinawa, Japan)

A simple and low-cost technology of coral restoration developed based on more than ten years of experimental studies in Japan.

NahaPort_Coralnet_ver1.mp4

This video clip shows an example of outcomes by installing Coral Net (Okinawa, Japan)

Technological Development for Artificial Base Structure

Coral Net

Biodegradable Type

Useful for the areas where reef current is weak. This type of Coral Net will be decomposed in 3 to 5 years after installation.

Coral Net

Durable Type

Useful for the areas where strong waves occur regularly. This type can be firmly anchored with reinforcing bars or bolts.

Previous Achievements of Coral Net

Coral Net (durable type) has been installed on concrete blocks in the ports where corals did not grow well due to sediment. In the 10-year of experiment, natural settlement of various coral types and species as well as their significant growth have been observed as a result of Coral Net implementation.

Coral Restoration in the Port of Okinawa

Durable type

The durable type provides a stable structure for natural settlement of coral larvae and growth diverse coral species even under strong wave conditions.

Coral Net installation on wave-dissipating blocks (2011)

Biodegradable Type

The biodegradable type promotes the growth of transplanted coral fragments (asexual reproduction) without leaving the artificial structure behind.

Eco-friendly Coral Net installation on wave-dissipating blocks (2011)

10+ years after installation of Coral Net (2022)

Fig. Long-term monitoring result of coral coverage after Coral Net installation (Okinawa, Japan)

Coral Restoration in National Parks

Biodegradable type of Coral Net was installed in national parks to protect corals from frequent damage caused by typhoon waves. Coral fragments placed on these Coral Nets successfully grew and confirmed that the structure facilitated coral regeneration.

Biodegradable type of Coral Net installed on the reefs severely damaged by a strong typhoon. (2012)

Steady coral growth observed on the Coral Net (2019)

AWARDS

This technology was highly recognized by Japan Society of Civil Engineers Environmental Award (2015): Development and practical application of “Coral Net”, a coral community restoration platform based on coral reef environmental assessment.

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