Impact · Program snapshot, September 2025
Restoration you can count.
Every figure Tidewright reports has a method behind it: satellite canopy maps ground-truthed by divers, credits that must pass eight additionality tests, and harvest revenue that goes back into seedstock. This is the whole ledger — the wins and the caveats.
- 4,200ha
- of reef reseeded or under active restoration since 2019
- 63sites
- across six coastlines, from Tasmania to Hokkaido
- 184species
- recorded returning to restored reefs
- 118ktCO₂e
- in the verified blue-carbon pipeline
Program figures reported by Tidewright, September 2025. Tidewright is a fictional company created as a design and content demonstration. All figures on this page are illustrative demonstration data — see the methodology.
Growth on the reef
Seeded, then verified.
Seedstock goes in the water fast and cheap; a verified forest takes two to five years of satellite passes, drone flights and diver quadrats. We report both — the hectares seeded each season and the smaller, harder number: canopy actually verified.
Hectares seeded per season
Holdfast lines deployed by hand and by Drifter vessel.
Verified canopy, cumulative
Satellite + drone mapping, ground-truthed by divers.
The economics
Restoration that funds itself.
Philanthropy opened the door; revenue keeps it open. Blue-carbon credits are issued only after verification — the pipeline is larger than what has ever been sold — and harvest from restoration-adjacent farms now carries nearly half the program.
Blue-carbon credits issued
tCO₂e sold to buyers per year. Pipeline of 118,000 tCO₂e not shown.
How the program is funded
Share of program revenue, September 2025 (illustrative).
- Tidewright Harvest sales46%
- Blue-carbon & biodiversity credits32%
- Council & government contracts14%
- Philanthropic grants8%
Harvest to date: 8,940 wet tonnes from restoration-adjacent farms. Fleet: 6 Drifter hulls, 4 Holdfast hatcheries. Read the blue-carbon explainers
Full record
Season by season.
| Season | Hectares seeded | Verified canopy (ha, cumulative) | Credits issued (tCO₂e) | Harvest (wet t) | Active sites |
|---|---|---|---|---|---|
| 2019 | 40 | 0 | — | — | 2 |
| 2020 | 90 | 32 | — | 110 | 4 |
| 2021 | 210 | 148 | — | 340 | 8 |
| 2022 | 460 | 402 | 6,400 | 760 | 16 |
| 2023 | 780 | 908 | 4,800 | 1,540 | 28 |
| 2024 | 1,210 | 1,702 | 11,300 | 2,680 | 44 |
| 2025 | 1,410 | 2,855 | 13,900 | 3,510 | 63 |
The caveats matter
What we don’t claim.
Kelp carbon accounting is genuinely hard: most carbon in a kelp forest is exported to deep water and sediment, and tracing it is expensive. We only count what we can verify — which is why the issued number will always look small next to the pipeline.
Not every seeded hectare becomes a forest. Recruitment failure, storms and heatwaves take their share; the gap between “seeded” and “verified” above is that reality, not a rounding error.