Breeding Behaviour of the Tubenose Goby
In 2025, while diving in Dutch freshwater lakes to document perch spawning, something unexpected caught my eye: a small, secretive fish guarding a nest. The…
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Spring Behaviour in Freshwater
It's early May and spring is visible everywhere above water. Underwater, the same shift is taking place, but in a less obvious way. Growth has begun, small…
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Publication: Perch Egg Ribbons in Spring
In 2025 I spent many hours diving in Dutch freshwater lakes during the spawning season, documenting biological processes that often remain unnoticed beneath…
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Dahab, Egypt
Dahab lies along the Gulf of Aqaba, where the Red Sea feels very different from the postcard image of shallow, gently sloping reefs. Here, the coastline…
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A Rare Low Latitude Auroral Event
Oosterbeek, where I live, is located at approximately 51.98 degrees north. This is a latitude where auroral activity is normally limited to faint glows low on…
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The Grey Trigger
This past weekend I joined the dive team of Scuba World Arnhem for a trip to Zeeland. It turned into a weekend full of energy: great people, inspiring…
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Chasing Life Below the Surface
While most people associate spring with blooming flowers and birdsong, I found my seasonal rhythm a few meters below the surface. This year, my focus shifted…
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