Page last updated at 05:45 GMT, Thursday, 3 September 2009 06:45 UK

Stricken salmon farm refloated

Mauve Stinger jellyfish
The Mauve Stinger jellyfish wiped out salmon stock worth 1m

A County Antrim salmon farm wiped out by a massive shoal of billions of small jellyfish two years ago is back trading in the business world.

More than 100,000 fish at the Northern Salmon seawater farm at Glenarm were killed during the seven-hour invasion.

The Mauve Stinger jellyfish shoal covered up to 10 square miles of water to a depth of 35 feet.

The damage cost the company more than £1m but it is trading again at original levels with help from Invest NI.

The jellyfish flooded into the cages about a mile into the Irish Sea, off Glenarm Bay and Cushendun.

Rescuers tried to reach the cages but the density of fish made it impossible.

In recent years, increasing numbers of mauve stinger jellyfish in the Mediterranean have posed a danger for swimmers.

Their presence in the colder northern waters was thought to be due to wind and tidal factors.

The salmon farm's managing director, John Russell, said at the time he had never seen anything like it in his 30 years in the business.

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