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 51–100

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

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 »

December 31, 2025

Move over AI, seaweed is the new wonder product

One type of seaweed cuts methane emissions and fattens cattle and another has natural polymers that behave like plastic.

Read on The Sydney Morning Herald »

December 3, 2025

Methane-busting startup Sea Forest debuts on the ASX with a bang

Shares in Sea Forest, an Australian livestock feed additive manufacturer using seaweed to cut methane emissions, traded 20% above its offer price after listing on the ASX.

Read on SmartCompany »

June 7, 2025

Structure

Sea Forest is a pioneering company focused on sustainable aquaculture, utilizing innovative practices to enhance marine farming. Their commitment to environmental stewardship and community...

May 29, 2025

Seaweed fed to cattle stops them farting methane - Ghanamma.com

Sea Forest has developed a seaweed-based feed that significantly reduces methane emissions from cattle. This innovative solution addresses environmental concerns while promoting sustainable...

Read on Ghanamma.com »

May 15, 2025

Australian seaweed farm tackles livestock burps to combat climate change

Sea Forest, an innovative Australian company, is making significant strides in combating climate change by utilizing seaweed to reduce methane emissions from livestock. Their sustainable farming...

Read on The Japan Times »

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