Rescuers are continuing to try and save a stranded humpback whale off Germany's north coast. The marine mammal, which is stuck on a sandbank, was first spotted in Lübeck Bay on Monday.

Diggers have been deployed to dredge a channel back into deeper waters. Characterised as a race against time, the rescue mission's attracting huge interest.

It's even being livestreamed from Timmendorfer Strand, a seaside town in Schleswig-Holstein. Estimated at being 12 to 15 metres long and 15 tons in weight, it's thought the whale could have previously become entangled in a fishing net, with rope still said to be stuck in its mouth.

Experts believe it's a young male that may have accidentally wandered into shallow waters. According to NDR, some speculate that it might be seeking a final resting place. However, the exact reasons for the whale's stranding remain unclear.

Warnings indicate that the chances of saving him are very slim, but rescuers are not giving up. For the whale, this is obviously a stressful situation, said Stephanie Gross from the Institute for Terrestrial and Aquatic Wildlife Research.

After three days in shallow water without feeding, the whale's condition continues to deteriorate. Despite the tough conditions at sea due to icy winds, divers have been sent in to assess the situation more closely.

Marine biologist Robert Marc Lehmann noted that while the whale's skin looks terrible, it is still responsive. The rescue team has attempted various methods to encourage the whale to move, including using tides and creating waves with boats. I hope the channel is deep enough that material will slide down and that this will motivate the whale to swim in. And if not, then he'll have to be given a little nudge, he expressed in his comments to NDR.