✂️ This is the 20 minute mini-cut of the full episode ✂️
Measuring impact is almost always a challenge 🤔.
It can be hard enough when you’re counting litres or kilowatts, but measuring your impact when you’re restoring the ocean is next level.
A coral reef is different to a kelp forest is different to a mangrove. So how do you standardise impact so it’s easy to package up and present to funders as valuable, measurable and verifiable?
That’s where the name Seatrees was born.
One Seatree is one unit of impact that can be applied to any marine ecosystem 🪸 🐟 🐠 🐡 🦀 🐋 🪸.
One planted mangrove seed is one Seatree 🌱.
One transplanted head of coral is one Seatree 🪸.
On square foot of kelp is (you guessed it) one Seatree 🥬.
Along with exceptional storytelling and a brand new real life ‘experiential home’ called the Sea House, being able to explain Seatrees' impact in simple, relatable terms has led the nonprofit to be one of the most successful of its size in the USA.
Co-founder Michael Stewart tells the story in S2E6 of the The Goodtrepreneur Podcast.
Tune in to learn:
💡 How the Seatrees idea began
🎙️ The importance of storytelling in the TikTok age
🌱 What it takes to restore an ecosystem from the ground up
🤨 Why Michael’s beanie is such a crazy bright shade of pink
Then go grow a Seatree at 👉 www.seatrees.org
We gave AI a listen and here's what it had to say.
The ocean is the defining feature of our planet, yet we’ve explored only a sliver of it and we still struggle to explain why ocean restoration matters in day-to-day terms. We sit down with Michael Stewart, surfer, founder of Sustainable Surf and co-founder of Seatrees, to talk about a deceptively simple idea: if you want to regenerate marine ecosystems at scale, you need a unit of impact people can understand, trust and fund.
Michael breaks down the Seatrees model across kelp forests, mangroves, coral reefs and seagrass meadows, showing how a “Seatree” works as a measurable, countable outcome with monitoring and verification. We also dig into a hard case study from Northern California, where over 95% of bull kelp has disappeared since 2013–2014. You’ll hear how a multi-year marine heatwave set off a cascade, from disease wiping out the sunflower star to urchins booming and mowing down kelp, and why those ecological shifts translate into real economic pain for coastal communities.
From there, we get practical about what wins attention in a noisy world: storytelling that’s tangible, human and even fun, plus real-world spaces like the Sea House in Encinitas designed to turn curiosity into action. We finish with Michael’s advice for anyone wanting to do meaningful work, start with curiosity, volunteer, reach out, and become indispensable. If you care about marine conservation, ocean regeneration, blue carbon and climate resilience, hit play, then subscribe, share with a mate, and leave a review to help more people find the show.
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