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WWF Cymru said excess nutrients from farming and sewage were leading to the growth of algal blooms, smothering the seabed.

In the meantime, salvage teams will retrieve the giant mast and the rigging from the seabed and do a final sweep for any other materials that may help the enquiry.

A superyacht has been raised from the seabed nearly a year after it sank off the coast of Sicily, killing seven of the 22 people on board.

The Crown Estate – which manages the seabed around England, Wales and Northern Ireland – is investing £400m in the UK's offshore wind supply chain.

"I think it's madness to launch predatory economic action that will disrupt the deep seabed, disrupt biodiversity, destroy it."