摘要：A colonial Didemnum sp. was found extensively overgrowing fouling organisms on the immersed surfaces of pontoons, ropes and chains and on the hulls of fouled pleasure craft in the Malahide Estuary to the north of Dublin in October 2005. The tunicate colonies formed pendulous growths extending ~1m on a yacht removed from the water in June 2005, but its significance at that time was not realised. A similar but less extensive cover by a Didemnum sp. was noted at a marina in Carlingford Lough, ~70km to the north of Malahide, in June 2006. Both sites are exposed to marine conditions on the east coast of Ireland in the Irish Sea. These forms have not been noted in Ireland before and may have recently arrived.
