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Kunstige rev senkes i Oslofjorden for å gi mer liv! 🪸🐟

Det var en stolt gjeng forskere og Oslofjord-entusiaster på plass i båtene da fire kunstige korallalgerev endelig skulle få sin rettmessige plass i fjorden.

De hvite og rosa korallalgerevene etterligner naturtypen ruglbunn.

Målet er å gi torsk, hummer og andre dyr nye leveområder i disse konstruksjonene. 🐟

Selv om slike småskala tiltak kan hjelpe fjorden, er de viktigste grepene fortsatt å redusere tilførselen av næringssalter, redusere fiskepresset og unngå mer nedbygging av strandsonen.

Sjekk ut hele saken til Dagbladet! Lenke finner du i kommentarfelt.

NIVA - Norsk institutt for vannforskning har jobbet for Oslofjorden i nesten 70 år! Nå bruker vi kompetansen til å utvikle og teste praktiske løsninger for fjorden sammen med andre sterke fagmiljøer gjennom prosjektet NB Oslofjorden.

Hurra for samarbeidet: @oslofjordens_friluftsrad @mareaoslo (nå inkludert i @marinreparatorene ), Urbant HAV, @oslomet , @fjordskole @fjordtunet_frivilligsentral frivillighetssentral, @urbanoceannorge , @naturvern og @bymiljoetaten @elin_t_sorensen_urbanthav .

#nboslofjorden
@martinhelseth

Foto: Nina Hansen / Dagbladet og NIVA

Prosjektet er støttet av @miljodirektoratet og @sparebankstiftelsendnb

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🦭

UPDATE:
300 signatures reached!
Thank you everyone!
————————————————————
Oslo friends and residents! 🙌🏽

The Oslofjord needs your help!

The Oslo 2040 land-use proposal DOES NOT include marine restoration as a standard measure. This could have significant negative effects through 2040, and we don’t want that! We want a living thriving Oslofjord so we can all enjoy it.

NB Oslofjorden! has written a petition to the Oslo City Council asking it to make marine restoration a standard measure. 300 signatures are needed for the City Council to consider it.

I made cute pixel-artwork as a final last push to help achieve it! (I hope you like my super cute harbor seal 🦭

The link is: https://minsak.no/sak/3674

It’s on my bio as well.
Thank you 🙌🏽

#oslofjord #2040 #marinerestoration #oslo #norway

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Nysgjerrig på hva du kan gjøre for å ta vare på havet? Og hvorfor det er viktig at vi alle gjør en innsats? 🧜

Kom og bli kjent med havhelter og organisasjoner som jobber for å ta vare på havet, i Løa (ved inngangen til Munchmuseet) lørdag 22. august kl. 12-14.

Det blir stands, panelsamtale, linotrykk på handlenett (eller egne plagg!) og lett servering fra Åpent bakeri og Villbrygg.

Vi sees! 💙

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MelaFantasi er Oslo Melas område for barn🦋Oslofjorden for Alle! Her kan barn og unge bli bedre kjent med fjorden vår, lære om hvordan vi jobber med å redusere plast i havet og forsøpling av fjorden vår og være med å lage kunst av plast fra havet. Kanskje blir det også mulig å håndhilse på en ekte sjøstjerne ✨

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Fieldnotes: Oslofjord

I volunteered with @mareaoslo and @marinreparatorene while they collected seaweed for their restoration work. We gathered mother kelp and cut the seaweed blades before packing them into @seaweed_solutions , where they will release spores to grow sporophytes in the lab.

The experience made me revisit the work of the late marine biologist #rachelcarson and consider how I can connect her observations with my own practice as a scientific illustrator.

Carson wrote about colour as an indicator of an ecosystem’s condition. She described green coastal waters, in all their shifting hues, as the colour of life. Through that lens, I returned to the fjord and looked at it differently.

I focused on the colours at the surface and began to notice the contrast between clear water and the more common brown-green water, which limits visibility. These colours can reflect the effects of nutrient runoff, wastewater, sediment, and other pressures on the ecosystem.

Colour, colour, colour—I keep thinking about it and wondering what it can reveal. These days I am thinking more carefully about what the fjord is showing us, and about the role visual communication can play in help return our attention to the sea.

#marinerestoration #oslofjord #prism #colour

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Today is Earth Day, but for two-time Olympian and @worldrowingofficial Healthy Waters Initiative Ambassador @martinhelseth, his work doesn’t fit on a calendar. Every day, he’s helping lead a growing movement that connects rowers to the waterways they depend on.

Growing up in Norway, he spent as much time beneath the surface as he did on it—free diving from a boat his father built, finding calm and clarity below.

But over time, what he saw underwater began to change. Pollution and marine debris became impossible to ignore.

In this episode, Martin shares how those early experiences shaped his mission today, and how rowers, clubs, and entire communities can become stewards of the waters they call home.

Hear our chat with Martin when it drops this weekend at steadystatenetwork.com/podcast AND anywhere you get podcasts

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We have now removed a total of 1,7 tonnes of marine waste from Skinnerbukta, and we can barely see the difference.
In a collaboration between @bymiljoetaten
@mareaoslo @oslofridykkerklubb and @marinreparatorene , we will do six volunteer freediving cleanups in the same bay, hoping to make a local difference
Thanks to @nordic_endeavour_2026 for joining in!

You will find the upcoming cleanups on the Marea Facebook page. Everyone is welcome!

#cleanup #freediving #oslo #norway #nature

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2# From cell to ecosystem. 🪸

This is an introductory diagrammatic view of the process.

Kelp is grown in the @seaweed_solutions lab in Trondheim, seeded onto ropes, and deployed in the Oslofjord by @mareaoslo , where it gradually develops into a structure that can support marine life.

Shoutout to @mikelgraphicscience for his introductory course on vector illustration a few years back- I finally put it into practice. :)

Stay tuned for future posts! 📈

#mareaoslo #scientificillustration #oslo

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Collab announcement! 🪸

I’ve recently teamed up with @mareaoslo as a scientific illustrator.

They are a young non-profit working with kelp cultivation in the Oslofjord, with a focus on supporting the restoration of marine ecosystems over time.

My role is to translate parts of this process into scientific illustrations - making visible what usually remains unseen.

It’s my first time working this closely with a team like this, and I’m learning a lot from how they engage with the material and the environment.

Also just a genuinely great group of people to work with.

Team:
CEO: @martinhelseth
COO: @coriready.world
Marine biologists:
@simmenkar
@kajamalene
…and more

A closer look at the process in the next post. // 1st photo by: @binwar_

#mareaoslo #scientificillustration #oslo

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The white carpet on this seafloor is not sand. It is Beggiatoa, a sulfur bacterium that thrives where nothing else can. It feeds on hydrogen sulfide and needs almost no oxygen. Where it blooms, the bottom has already given up.The smell is rotten eggs. That is H₂S, toxic even in low concentrations. Dizziness, nausea, disorientation. At higher levels it knocks out your sense of smell entirely, and then it knocks you out.

For a freediver at the surface, one breath of the wrong pocket of air can mean losing consciousness in the water. My friends where lucky. Some days later I went to investigate together with two scientists from The Norwegian Institute for Water Research (NIVA).

I usually dive down myself to document what I see. Not here. Here I lower my camera on a long pole and keep my head above water.
I have seen this in several places around Norway now. It shouldn’t be possible. But it is. And now, close to my home.

The oceans have lost roughly two percent of their dissolved oxygen since 1960. Warmer water holds less. Runoff feeds algae that sinks, rots, and steals what remains. Over 700 dead zones globally. The number keeps growing.

The ocean built the atmosphere we breathe. Billions of years of marine life put the oxygen there that we carry in our lungs. But the ocean isn’t filling our air anymore. It is struggling to keep enough for itself. We did this. The same species that once breathed thanks to the ocean is now suffocating it.

Imagine living in your home and one day there is no more air. That is what is happening below the surface. Try holding your breath.
Now try holding it forever.

#oceandeoxygenation #deadzone #oslofjorden #freediving #oceancrisis

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A day well spent, harvesting kelp with @mareaoslo 😍
122Kg of kelp 🤩

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In November 2025, we put out the rope. We decided to test wool rope, reused rope that we carefully washed after last year’s harvest and new rope. And it looks like reused rope works very well! Which is one thing we really wanted to test this growing season. All rope was pre-seeded with kelp sporophytes cultivated in Trondheim by @seaweed_solutions —using local “mother kelp” we harvested nearby and sent to their lab.
From the 1 km deployed, we were able to wet harvest 122 kg of kelp. Thank you to everyone who joined the harvest. We had people from six nations on the team today— all with the goal of vibrant biodiversity in the Oslofjord. Thanks to Eli Rinde from @nivaforskning for taking scientific samples of the kelp, and to our project funders @oslo.kommune @miljodirektoratet. Thanks to Padda Båtforening for lending us the båtplass. Dreaming of kelp forests and carbon sinks. From fjord today to future fjord 🌊

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