Blog

Publication: Breeding behaviour and embryonic development of the tubenose goby June 14, 2026 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 tubenose goby (Proterorhinus semilunaris) turned out to be far more accessible than I had imagined. What started as simple curiosity quickly grew into a passion. Throughout the season I followed the complete embryonic development of this species from freshly laid eggs to […]

Spring Behaviour Freshwater Netherlands May 11, 2026 It’s early May and spring is visible everywhere above water. Trees are turning green and filling with leaves, insects are starting to appear. Underwater, the same shift is taking place, but in a less obvious way. Growth has begun, small life is present, and reproduction is already underway. A system coming back to life While the water is still relatively cold but slowly warming, life is already in motion. Not explosive or obvious, […]

Publication: Perch egg ribbons in spring April 8, 2026 In 2025 I spent many hours diving in Dutch freshwater lakes during the spawning season. During that period, I focused on freshwater underwater photography in the Netherlands, documenting biological processes that often remain unnoticed beneath the surface. One of these observations developed into a photographic article on freshwater fish reproduction, focusing on the remarkable egg ribbons of the European perch. Perch Egg Ribbons This article focuses on the remarkable egg ribbons […]

DAHAB, EGYPT February 24, 2026 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 borders a tectonic rift. The seabed doesn’t gradually taper into the distance. It drops. The reef ends abruptly and the blue takes over. You are not swimming toward an underwater horizon. You are suspended above depth. Lagona Divers was our base for the week, with Golden Blocks as our […]

A Rare Low Latitude Auroral Event January 22, 2026 “Auroras are not supposed to behave like this at this latitude.” 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 the northern horizon, if it is visible at all. Clear overhead structures, distinct auroral bands, and a full auroral dome belong to far northern regions, not to a suburban field in the Netherlands surrounded […]