Meet an Unreasonable Venture

Sea Forest

Abating climate change using seaweed feed to reduce livestock emissions.

Sam Elsom

Co-founder & CEO at Sea Forest

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seaforest.com.au

Employees 21–50

Headquarters Australia

Sea Forest cultivates red seaweed as a feed supplement that reduces methane emissions from livestock. Based in Australia, Sea Forest can reduce cattle emissions by up to 80% through feed delivery systems such as feed additives for barn-based cattle and lick blocks for grazing cattle. Their customers include Asahi and Fonterra, having achieved positive market trials and won awards for sustainability. Longer term, Sea Forest aims to scale up and integrate into global supply chains and become a more consumer facing brand.

Energy & Environment and Food & Water

Notable Achievements

Proved that 0.5% of SeaFeed™ can cut methane production by up to 90%
Named as finalist for the 2023 Earthshot Prize in the ‘Fix Our Climate’ category
Sea Forest's Triabunna facility achieved FAMI-QS certification, assuring customers that quality, safety and operational practices meet regul

Currently Operating in 65 Regions

Press Mentions

August 28, 2026

Sea Forest ramps up revenue 486pc and slashes losses

Sea Forest has experienced significant revenue growth and reduced losses as it expands its innovative seaweed-based livestock feed. This product aims to minimize methane emissions from cattle,...

February 25, 2026

The science of saving the world’s surf breaks

Sea Forest is playing a pivotal role in global efforts to restore surf breaks and marine ecosystems by utilizing innovative seaweed solutions. Their initiatives are significant in combating climate...

Read on The National Tribune »

February 9, 2026

Class of 2025: Where Are They Now? - Superhero

Sea Forest is highlighted for its innovative approach to reducing greenhouse gas emissions through seaweed cultivation. The company's sustainable practices showcase advancements in environmental...

Read on Superhero »

January 20, 2026

Commercial trial examines methane reduction for beef industry

Sea Forest is pioneering a commercial trial to reduce methane emissions in the beef industry through a nature-based supplement. This collaboration is a significant step towards sustainable beef...

Read on Food & Beverage Industry News »

January 14, 2026

Australian beef industry collaboration launches methane reduction trial with nature-based supplement

Sea Forest collaborates with the Australian beef industry to launch a promising methane reduction trial using a nature-based supplement. This initiative aims to significantly lower greenhouse gas...

Read on RW »