The video was supposedly filmed in 2023 by a group of deep-sea divers in the Banda Sea, Indonesia. Tsunamis are most often caused by violent underwater earthquakes that move large amounts of water.
Geoscience Australia claims the update to Darwin's risk assessment is based on recent seismic activity in the Banda Sea.
In 2022, I was hired by the BBC Natural History Unit to go to the Banda Sea to capture a remarkable behaviour: sea snakes teaming up with trevally fish to hunt. I had previously heard about this ...