Authorities are continuing to monitor a baby humpback whale tangled in fishing tackle in Sydney Harbour this morning after efforts to free it before darkness fell on Thursday evening.
Police and Maritime services boats are tracking the animal around Bradleys Head in Mosman, as it dragged a line with three buoys attached.
Police, National Parks and Maritime Services are enforcing an exclusion zone around the animal, which continues to drag a line with buoys attached, breaching every few minutes. Authorities attached a tracking device to the whale on Thursday, which became dislodged overnight.