Ballast Blog – Invader of the Week – Codium Fragile

Malin Group Ballast Blog

This weeks invader, more commonly referred to as Dead Mans Fingers, is native to the Pacific Ocean around Japan and Korea. However it was first found in Ireland in 1808, and 30 years later in Scotland. It made an appearance on the shores of the Netherlands just before 1900 and can now be found throughout Europe and along the east coast of the US, from the Gulf of St Lawrence all the way to North Carolina. It is not entirely clear how the species came to travel so far, but it is thought that fouling of ships hulls played a …

Ballast Blog – Invader of the Week – European Fan Worm

Malin Group Ballast Blog

This weeks invader is native to the Mediterranean and Northeastern Atlantic ocean. It is a filter-feeding tube worm that can form vast meadows across the sea floor. It is considered an invasive species in Australia, where it was first seen in 1965. The species is thought to have been introduced both as larvae in ballast water and adults attaching themselves to ships hulls. Their presence can be a nuisance as they can reduce fish numbers, destroy aquaculture and clog dredges and nets. They also excrete nitrogen which encourages the growth of algal blooms. (Photo courtesy of scienceimage.csiro.au)