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Mars Coral Reef

Section 3

Impact Below Water

Working with local communities around the world, we have rebuilt 112,000 square metres of reef in the most biodiverse seas on the planet.

Before and after

At its most effective, the MARRS method can transform heavily degraded rubble fields into healthy coral-dominated ecosystems within a few years. Drag the slider below to see this for yourself, comparing illustrative examples of a degraded rubble field and a nearby restored reef, 3 years after Reef Star installation.

Degraded rubble field,

<5% live coral cover

3 years post-restoration,

>60% live coral cover

Use the slider to see the difference yourself.

Mars, and partners, Impact in numbers


square metres of restored reef


corals planted


Reef Stars installed


Reef Star sites in 11 countries


increase in coral cover


increase in fish populations


increase in fish biomass

Published reports

We have a detailed monitoring program that regularly measures the progress of our restoration projects. Some of the outputs of this monitoring are detailed at these links to books and peer-reviewed journal articles. Explore more of our outputs on the resources page.

Williams et al (2019)

Large-scale coral reef rehabilitation after blast fishing in Indonesia, Restoration Ecology 27: 447-456.

Seraphim et al (2020)

Interactions between coral restoration and fish assemblages: implications for reef management. Journal of Fish Biology 97: 633-655.

Lamont et al (2021)

The sound of recovery: coral reef restoration success is detectable in the soundscape

International Coral Reef Initiative

A summary of our restoration approach and progress on the ICRI website

Nature Portfolio

A discussion of our collaborative approach published by the Nature Portfolio

Lamont et al (2022)

Multi-dimensional approaches to scaling up coral reef restoration

Williams et al (2022)

Enhancing automated analysis of marine soundscapes using ecoacoustic indices and machine learning