Câr-y-Môr
Wales’ first commercial-scale seaweed and shellfish farm, owned by more than three hundred people who live within sight of it.
A coastline that already sponsors itself.
Câr-y-Môr - “for the love of the sea” - is a community benefit society farming seaweed and shellfish off St Davids, at the far western tip of Pembrokeshire. More than three hundred local members hold it. Surplus stays in the community by constitution rather than by good intention.
It is the proof that the demand side of this model already exists without us. Hundreds of people in one small corner of Wales chose to put money into a marine farm because it was theirs and it was there. Our job is to make that impulse available to someone in Cardiff, or Bristol, or a company with a depot in Haverfordwest.
The site runs integrated multi-trophic aquaculture: seaweed alongside shellfish, each improving the water for the other. Harvest goes to Pembrokeshire holdings, a region with a dense mix of dairy and horticulture and short distances between harbour and field.
For corporate sponsors this is the easiest farm in the network to explain to a board. Community-owned, nationally recognised, an hour from the M4, and entirely legible in a single photograph.
Key information
| Intervention | Integrated seaweed and shellfish cultivation, community benefit society |
|---|---|
| Location | St Davids, Pembrokeshire, Wales |
| Species | Saccharina latissima, alongside native shellfish |
| Sponsorship unit | One metre of seeded rope for one growing season |
| End use | Soil conditioner and biostimulant trials, Pembrokeshire holdings |
| Ownership | Community benefit society, 300+ local members |
| Season | Seeded October, harvested May to June |
| Standard | The Holdfast Standard v1.0 |
| Status | Harvesting |
Sustainable Development Goals
The Holdfast Standard score: 8.1 / 10
Assessed across 106 data points in August 2026, reviewed by an independent academic partner. The network minimum is 5.5.
The strongest People score we have issued, driven by the ownership structure and the share of revenue that stays inside the county. How scoring works
Positive for people
Community ownership here is a legal structure rather than a marketing line. It carries an asset lock, and it means sponsorship money cannot be extracted from the area by a later owner.
The farm supports year-round employment in a part of Wales where most coastal work is seasonal and tourism-dependent. It also runs training and volunteer days, which is how a large share of the membership first got involved.
Land partners receive harvest at no cost, with soil sampling before and after application on participating fields.
Good for the sea
Species recorded on or around the cultivation lines during the most recent survey season.
- Ballan wrasse
- Corkwing wrasse
- Juvenile pollack
- Velvet swimming crab
- Blue mussel
- Sea squirts
- Snakelocks anemone
- Spider crab
- Grey seal
- Manx shearwater (foraging)
On site




Sponsoring at corporate scale?
Pair this farm to a site or a region, and we will build the reporting around your footprint rather than ours.

