The Santa Anna went aground in rough seas and winds gusting to more than 50mph. She was carrying clean ballast, but also 200 tonnes of fuel oil and 50 tonnes of lubricating oil.
The Marine Pollution Control Unit had been informed and was monitoring the situation, said coastguards. There were no plans yet to take any of the crew off the vessel.
The crew are understood to be Spanish, and the boat had been moored in Torbay.Reuse content