Sea Ranger Service

01/09/2026

The Sea Ranger Bootcamp is back in the Netherlands and South Wales in 2027. Join our bootcamp newsletter on our website to be the first to hear more information!

28/08/2026

"Being in TIME changed nothing about our impact and everything about how people perceive it."

In his latest reflection, Sea Ranger Service Founder, CEO Wietse van der Werf explores the tension between impact and visibility, and why organisations working for positive change ultimately have two jobs: making an impact on the ground and communicating it to the world.

Because the best-known organisations are not necessarily the most effective. Sometimes, they are simply the ones whose stories have been heard.

Read Wietse’s full reflection: https://searangers.org/blog/time-magazine-featured-our-work-peoples-response-was-revealing/

As nonprofits and impact organisations, we spend a great deal of our time worrying about how to best measure our impact. We track outputs, analyse the outcomes they’re leading to and report on it. For some of our investors, the measured impact even determines how much annual interest we pay on out...

20/08/2026

🌱 What does seagrass restoration look like in the Netherlands?

17/08/2026

🌱 Ever wondered how we monitor seagrass growth? Sea Ranger Roos takes us along for a sneak peak in the field.

13/08/2026

🛒 Good news! You can now pay with iDEAL in our webshop: https://searangers.org/products/

13/08/2026

🌱 What does seagrass monitoring actually look like? Sea Ranger Ditmar takes us into the field and reveals what we look for when assessing the health and growth of seagrass.

12/08/2026

How many microplastic particles are there in this jar of seawater from Port Talbot beach?

11/08/2026

🎥 Sea Ranger Service was featured in the Dutch newspaper Trouw! Dan tells us more about it in the video.

Read the article here: https://www.trouw.nl/verdieping/de-jonge-sea-rangers-brengen-nieuw-leven-in-kustwateren~be2e6e2a/?referrer=https%3A%2F%2Fwww.google.com%2F

05/08/2026

🌿 Seagrass restoration is not only about planting, it is also about creating the right conditions for seagrass to survive.

Excess algae can cover young seagrass, blocking sunlight and potentially smothering the plants. By carefully removing it, Sea Rangers help the seagrass access the light it needs to grow and give newly restored areas a better chance to develop into healthy meadows.

Support our seagrass restoration work: https://www.sumthing.org/projects/SR-001/restoring-seagrass-in-the-eastern-scheldt

University of Groningen
Project Seagrass
Sumthing Sumthing
Conservation Optimism
Gipreb
Office français de la biodiversité