Project Overview

As part of our initiatives in Thailand, Ultima Impact visited a coastal oyster and mussel farm to learn how marine life — often seen only as food — can also be powerful allies in the fight against climate change.

This wasn’t a planting activity. It was a learning one. Hosted by local aquaculture practitioners, our team took a boat tour out to the farm to see how shellfish are cultivated, and how their presence quietly improves the health of our oceans and the resilience of our coastlines.

Why it Matters

Shellfish like oysters and mussels aren’t just delicacies — they’re climate contributors.

• Water filtration: A single oyster can filter up to 190 litres of water a day, removing pollutants and improving clarity.
• Carbon storage: Their shells trap carbon in a stable form, contributing to long-term carbon sequestration.
• Habitat support: Shellfish reefs create homes for fish, seagrass, and other marine life.
• Coastal defence: Dense reef structures help reduce wave energy and prevent erosion.
• Low-impact farming: Shellfish aquaculture emits far less carbon than other protein sources — making it one of the most sustainable food systems in the world.

This visit helped the team understand how ocean-based climate solutions can be sustainable, scalable, and deeply local.