Hi PHIL,
This in all practicality is not an Eddy. An Eddy forms usually from the northward moving current of the gulf stream and as the coloration may be true in this case it is most likely caused by a thermocline or some other current.
Eddies on the East side of the Gulf Stream usually are counter clock wise currents of warm water that break off from the Gulf Stream but as far as coming this close to shore is pretty unlikely. On the western side of the Gulf Stream where the Labradore Current runs north to south and parallel to the coast the Eddies form a clockwise current of circulation.
These eddies are miles across and could go as deep as 4000 meters.
I am not saying it could not happen but for the most part it is caused by other factors.
I hope this helps and doesn't confuse your question.
PAul