Reef cubes® - Artificial Reef Modules for Scour Protection and Habitat Restoration

The most technologically advanced and effective artificial reef available

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Product Overview

Nature-Inclusive Design, engineered for every marine environment

Reef cubes® are exceptionally versatile, designed to perform across multiple industry sectors, from offshore wind and coastal defence to large-scale restoration projects. Each system is engineered to build sustainable underwater futures through habitat creation and ecological enhancement.

Let’s explore how we can enhance biodiversity, protect infrastructure, and achieve your environmental goals without compromise.

With a 91 % carbon saving over ordinary Portland cement (OPC) and a plastic-free, low-carbon construction, every Reef cube® is designed from the ground up as a Nature-Inclusive Design (NID) solution for the future of marine restoration.

Patented. Proven. Iconic. There's over 10 years of scientific research and development behind every Reef cube®.

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Benefits

Product Spec

98% Recycled Materials
100% Plastic Free
Unparalleled Biodiversity Results
Award-Winning Carbon Neutral Construction

Sectors

Reef Cube Applications

Coastal

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Fisheries

Offshore

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Scientific Facts

Reef Cubes Spec

Up to 2m³
In size and 15 tonne per unit
2,350kg m³
Density (approx)
>91%
Carbon saving over Portland Cement
100%
Plastic-free

Reef cube® Types and Sizes

The Original Reef cube®
Designed for scour protection and rock berm applications, the RC150 and RC350 models are our original Reef cubes®, engineered as low-carbon replacements for traditional small rock armour used around offshore wind turbine foundations and oil & gas platforms.

Unlike conventional materials, Reef cubes® deliver greater habitat complexity and enhanced ecological value, transforming functional scour protection into a biodiversity-enhancing reef system.
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Artificial Reefs and Scour Protection Reef cube®
The RC500 is our mid-sized Reef cube®, designed for artificial reef creation and scour enhancement around subsea infrastructure.

Compact yet versatile, it bridges the gap between small habitat units and larger scour protection systems, ideal for projects requiring both ecological function and engineering stability.
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Mid-Sized Versatile Reef cube®
The RC750 is a mid-sized, multi-purpose Reef cube® used for artificial reef construction, scour enhancement, and fill-ins within coastal or protective groynes.

Balancing size and manoeuvrability, it provides both structural stability and habitat complexity, making it ideal for coastal defence projects and marine restoration schemes requiring adaptable, nature-inclusive solutions.
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Large Reef cube®
The RC1000 is a large-format Reef cube® designed for artificial reef construction, scour enhancement, and coastal defence applications. Its increased size provides greater mass and stability, enabling deployment in high-energy environments such as offshore wind turbine foundations, breakwaters and exposed coastlines, where both engineering performance and biodiversity enhancement are essential.
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Very Large Reef cube®
The RC1500 is a very large Reef cube®, weighing approximately 5 tonnes per unit. It’s our most widely used model for intertidal installations, offering excellent stability, habitat creation and structural resilience.

With sufficient mass for the majority of offshore and coastal applications, the RC1500 provides extensive ecological benefits, creating complex habitat networks for marine life while meeting the engineering demands of high-energy environments.
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Our Largest Reef cube®
The RC2000 is our largest and most heavy-duty Reef cube®, engineered to deliver maximum stability and reef coverage in demanding offshore and coastal environments.

Providing the greatest structural strength in the range, it’s ideal for extreme weather conditions and high-energy sites, offering expansive habitat creation alongside reliable engineering performance.
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The ultimate reef solution

Three engineering and ecological advantages that make Reef cubes® the leading choice for offshore and coastal projects.

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How Reef cubes® Are Used Across Marine Industries

The range

Subtidal Reef cube®
Over 10 years development
Our original, flagship artificial reef module, developed through over 10 years of continuous scientific research and innovation.

Designed with exceptional detail, its Nature-Inclusive Design (NID) incorporates advanced 3D-printed textures to promote colonisation by local fish, crustaceans, corals and kelp species. Each unit can be customised by size, texture and internal passageways, ensuring optimal performance for specific marine environments.

Available in sizes ranging from 15 cm³ to 2 m³, the Subtidal Reef cube® is our most widely deployed model, ideal for artificial reef creation, scour protection and habitat restoration across offshore and nearshore applications.

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Reef cube® Combos
Connecting cubes
By leveraging the modular design of Reef cubes®, individual units can be connected to create large, stable reef systems with limitless configurations.

ARC marine® combines a range of cube sizes and structures to form complex, multi-level habitats that support a diverse spectrum of marine life, from benthic species on the seabed to pelagic species higher in the water column.

Operationally, this modular approach enables the use of smaller, easier-to-handle units during manufacturing, transport and installation, while still achieving the mass, stability and interstitial volume required to form productive, long-lasting reef systems.

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Intertidal Reef cube® with Rock Pools
Designed for tidal regions
Closely based on our original Subtidal design, the Intertidal Reef cube® retains all the same performance and ecological benefits, with the added advantage of integrated rock pools on the top, sides and base.

These recessed features provide permanent water pockets, creating vital refuge for intertidal species during low tide and encouraging colonisation by algae, crustaceans and small fish. The adapted base passageway includes an additional rock pool cavity, increasing habitat diversity across tidal ranges.

Available exclusively in larger models for enhanced stability, this version is purpose-built for tidal environments where structures are periodically exposed. It provides continuous habitat and shelter for a wider range of marine life, helping to bridge the gap between terrestrial and fully submerged ecosystems.

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Reef cubes® for Scour Protection
Replacing imported Granite rock
Typically composed of RC150 and RC350 models (with custom sizes available for specific site conditions), Reef cubes® provide an innovative alternative to traditional rock armour for offshore wind turbine scour protection.

Designed for deployment using standard side-dump or fall-pipe vessels, they can be installed efficiently around turbine foundations, cable routes and other subsea infrastructure.

By replacing imported granite with a locally manufactured, low-carbon and biodiversity-enhancing solution, Reef cubes® deliver robust engineering performance while supporting Nature-Inclusive Design (NID) principles, non-priced tender criteria and corporate sustainability goals.

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What our clients are saying

Testimonials

"ARC marine provided an excellent service. They discussed our project knowledgeably and provided constructive recommendations. We will happily work again with ARC marine in the future."
"We’re proud to partner with ARC marine to advance their innovative solutions, which offer a practical and scalable approach to sustainable offshore development. ARC marine’s approach – integrating eco-engineering into marine construction – is both timely and closely aligned with the growing emphasis on environmental stewardship across the industry."
"It's been a real pleasure working with ARC marine's enthusiastic, professional, and passionate team."
"It has been a pleasure to collaborate with ARC marine and our project partners on the Falmouth harbour Reef cube installation and STEM school outreach. ARC marine have nature and biodiversity enhancement at the front and centre of their work, and it is exciting to already be able to see a positive outcome for biodiversity in the region."
"Kier, the Environment Agency, and Atkins have been very impressed with the quality of finish of the units"
"The ARC team provided a seamless transition from deployment study to product supply on a complex project. We are looking forward to the next one."
"These pioneering products have the potential to improve the health of our oceans for generations to come"

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Client-first evolution by in-house scientists

Our in-house team of scientists and engineers work closely with all our clients to ensure the reef design surpasses the specific needs and requirements of any given project.

As a result we see extensive enhanced biodiversity results, a wealth of new habitats and flourishing new marine life in all regions of the world – continuing to push reef cubes as the most technologically advanced and effective artificial reef available.

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