Sarah Matthews of Dolphin Zone said: “They are registered in the Iberian Orca catalogue for management purposes, but are very different from their Iberian-type counterparts.”The Wildlife Trust said the sighting was the first time Iberian orca had been seen in Cornish waters. “As we headed in that direction, Isaac Ogden – who was crewing with me – spotted some fins over a mile away. “This is because the only orca involved are a small number of the tuna-eating orca who are based in the Gibraltar Strait. “While it is possible that the orca spotted off the South West are tuna eating, they are not the orca which damage yachts.”Want to read more articles like this? PBO is packed with information to help you get the most from boat ownership – whether sail or power.