Reef Cubes

The building blocks for the oceans

Reef Cubes are pre-cast eco-friendly low CO2 concrete structures that protect man made subsea assets whilst accelerating reef creation to enhance the marine environment and leave a positive marine legacy. They are non-toxic, contain zero plastics and are made from 100% recycled materials supporting the circular economy. Designed to be left in-situ forever, they are destined to become the defacto standard for protecting cables, pipelines and monopiles due to their life cycle cost saving and nature inclusive design benefits.


90% lower CO2 footprint
Non-toxic to marine environment
Zero plastics
Made from 100% recycled materials
Proven eco-system enhancement
Supports SDG-14 life below water
Reduced life cycle costs if not recovered
Eliminates HSE risks if not recovered
Deployment track record to date weak
OSPAR yet to accept as suitable for long term deployment without recovery liability


Areas of Application Cable and pipeline protection, scour protection, habitat enhancement, anti-bottom trawling deterrent for MPAs.
Capabilities Global deployment strategy through licensing agreements. ARC Marine offer full reef planning, execution, monitoring and stewardship support
Compliance Nature inclusive design, formal marine concrete and lifting specification approvals pending.
Deployment Compatible with traditional deployment techniques e.g. Block grabber, lifting frames, fall pipe and tremie pipe units.
Environment Non-toxic to marine environment. Low CO2, zero plastics. Supports circular economy and SDG-14 life below water.
Lifespan Designed to be permanent (500 years+) but can be made with finite biodegradable materials for certain applications.
Material 100% recycled materials, zero plastics, 90% lower CO2 than Portland cement. Densities, surface textures and colour all configurable.
Modular design Building blocks from 15cm to 1.5m in height can be combined into complex structures. Variants for specific marine species e.g. Native oyster (Ostrea Edulis).
Patents Patent granted UK and pending in target countries including US, China and Brazil.
Protection Protects both man made assets and the surrounding eco-systems. Does not suffer from leading edge flip over unlike traditional subsea mattresses. Stable and effective in shallow and deep water anti-scour service.
Relative business impact
CO2 footprint reduction:
Cost reduction:
Safety improvement:
Technology Readiness Level
Development Technology demonstration Mature / Proven

About ARC Marine

ARC Marine specialises in accelerating reef creation using our patented product Reef CubesĀ® to create sustainable eco-friendly marine habitats. Our expertise is in the design, manufacturing and deployment of Reef CubesĀ® and the monitoring and long-term custodianship of new reefs.

Applications include coastal defense, offshore energy, eco-tourism, aquaculture and anti-bottom trawling deterrents in marine protected areas. Our product is non-toxic, contains no plastics and can be
made locally using sustainable aggregates and recycled materials, creating jobs in the communities impacted.

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