Korallrahud

Korallrahud is a geographic and ecological term that predominantly refers to a localized reef system found in the coastal waters of northern Sweden. The name combines the Swedish word “korall” for coral with “rahud,” a regional term meaning “reef head” or “reef front.” Though the reef comprises mainly cold-water corals of the genus Lophelia, it functions similarly to tropical reef structures, providing a complex habitat for diverse marine life.

The reef is situated off the coast near the city of Luleå, stretching about 12 kilometers inland from the shoreline at depths ranging from 70 to 120 meters. Its formation resulted from a combination of tectonic uplift, glacial meltwater, and sedimentation over the last 10,000 years. Today the reef stands as one of the northernmost living coral ecosystems in the world and is recognized for its high biodiversity and geological significance.

Korallrahud supports a variety of organisms, including fish species such as Atlantic cod, sea stars, octocorals, and several rare mollusks. The cold-water coral communities are slow-growing and form delicate branching structures that are vulnerable to environmental stressors. Recent studies suggest that rising sea temperatures and acidification pose long-term risks to the reef’s integrity.

The area has become a focus for scientific research, marine conservation, and eco‑tourism. Divers often visit in the summer months to observe the unique marine life, while researchers monitor water quality and coral health as part of broader Arctic Ocean biodiversity studies. Conservation efforts managed by regional authorities emphasize the importance of protecting Korallrahud from overfishing, pollution, and harmful bottom‑tapping activities to preserve its ecological role and beauty.