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Sea Squirts - Didemnum species

Marine; salt water organism.

Currently confirmed present in Carlingford Lough, Co. Louth, Malahide Marina, Co. Dublin and Galway Bay, Co. Galway.

What does it look like?
Exact identification of this species is very difficult and can only be undertaken by a trained expert. However, in general native species are not found in large colonies and do not form the candle wax like dripping structures of Didemnum sp. The coloration may differ slightly from a pale white/peach to orange colour.

Sea Squirt interferes with marine habitats and outcompetes native species such as seaweed, scallops, mussels and oysters that depend on the sea floor for habitat. They produced noxious substances that deter most fish and other animals.

What can you do?
Do not attempt to remove the species as this may only lead to the further spread of the organism. Visit the Invasive Species Ireland website to find out more and to report sitings.

©2007 Department of the Environment, Heritage and Local Government