Healthy Protein: A Sustainable Choice That Starts at the Source

The global demand for animal protein is projected to rise by more than 70% by 2050 (FAO, 2017), putting enormous pressure on land, water, and ecosystems. Traditional livestock production is resource-intensive and a major driver of greenhouse gas emissions, accounting for nearly 15% of all anthropogenic emissions (FAO, 2013). While aquaculture has emerged as a promising alternative, many systems still rely on high inputs of feed, energy, and antibiotics, contributing to pollution and unsustainable practices.

To meet future needs without accelerating climate and biodiversity collapse, we must find efficient and ecologically responsible ways to produce high-quality protein.

Merall's Approach: Aquaculture Done Differently

Merall cultivates marbled crayfish (Procambarus virginalis), a self-cloning, robust freshwater species, in a low-impact, closed-loop system. Our farming method is designed to optimize yield while minimizing environmental footprint:

No antibiotics or hormones
Low water and energy requirements
Efficient feed conversion
Locally farmed in Osnabrück, Germany

Unlike conventional aquaculture species, marbled crayfish thrive in high-density recirculating systems and are uniquely suited for circular production models. In fact, our research confirm their ability to grow in closed environments with minimal requirements.

Market Opportunity

Europe’s seafood demand is outpacing its supply, with more than 60% of consumption reliant on imports. At the same time, consumers and institutions are shifting toward sustainably sourced and antibiotic-free options, especially in schools, canteens, and retail channels.

Crayfish protein offers:

A shrimp-like product.
High-protein and low-fat alternative
Alignment with sustainable procurement goals

With the rise of ESG reporting and green food labels, healthy organic meat solutions like Merall’s are well positioned for both public and private sector uptake.

Locally Produced, Globally Relevant

By combining responsible aquaculture with a circular value chain, Merall delivers not only healthy food but also raw materials for sustainable bioplastics — all from a single species. Our model reduces dependence on imports, limits environmental harm, and supports EU goals for food resilience and climate neutrality.

As the FAO’s “Blue Transformation” strategy emphasizes, the future of protein lies in resource-efficient, low-impact aquatic farming, and Merall is already making it happen.