Tagged great white off Cottesloe A tagged great white shark was detected off Cottesloe Beach around 12.30pm. Picture: Thinkstock Source: Herald Sun A TAGGED great white shark has been detected off Cottesloe Beach today. The tagged shark was found by the Cottesloe beach's receiver at 12.36pm. Surf Life Saving WA has been advised by the Department of Fisheries. The shark was then detected again at 12.42 pm. The reported great white follows several other detections in the early hours of Tuesday morning when another tagged shark was detected several times around 3am.