Strangford Lough - The beasts down below

4 October 2012 Last updated at 14:45 ET Help

An invasive alien marine creature that can smother native species has been found in Strangford Lough.

The carpet sea squirt was found about three weeks ago on a routine check by environmental officials of the lough.

They are now trying to find out how far it has spread.

Claire Savage reports for BBC Newsline.

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