It was not immediately clear if the whale was Timmy, the humpback whale that captivated Germany for weeks while getting stranded multiple times off the German coast.
A whale has reportedly been spotted off the Danish island of Anholt, with the local Danish Environmental Protection Agency believing it has been dead for some time, according to Danish media.
The animal is believed to be a stranded humpback some 10 to 15 meters (about 33 to 50 feet) long, Danish media reported, inviting speculation over whether it could be Timmy the humpback whale.
It was sighted about 75 meters off the coast of Anholt. Officials said they plan to retrieve the whale on Friday.
For weeks, Timmy kept getting himself stranded off the German coast after many successful attempts to set him free, until a final rescue mission guided him to the North Sea.
