Invasive snail species raises ecological concerns in Iceland’s coastal regions

An invasive snail species has been drawing increasing attention for its rapid spread along the coast of Iceland. Biologist Svanhildur Egilsdóttir, who specializes in marine biology, is particularly alarmed by the presence of the snail, Melanochlamys diomedea. This exotic species was first noticed in the summer of 2022 when she began to observe strange, translucent egg sacs along the beach, which she initially found puzzling.

Svanhildur’s investigations, prompted by her curiosity and the subsequent genetic analysis of the samples collected, revealed that these snails are native to the Pacific Ocean and have not previously been recorded in the Atlantic. During a recent expedition, she discovered these snails in various locations including Dýrafjörður and Barðaströnd, with plans to search in the East Fjords next.

The sheer density of these snails surprised her; in some areas, she found colonies covering every square meter. Svanhildur points out the distinct habitat preferences of the snail, which thrives in soft, sandy environments rather than rough coastal areas. While she is eager to find this increasingly common creature, her emotions are mixed as she contemplates the ecological implications of its invasion.

The presence of Melanochlamys diomedea raises concerns about potential disruption to local ecosystems, including its impact on native species. As further research is necessary, Svanhildur remains committed to monitoring and understanding the consequences of this invasive species and advocates for more scientific efforts to address the ongoing biological changes in Iceland’s coastal regions.