Norway

The Norwegian Broadcasting Corporation NRK (nrk.no) first reported the diving incident:

An American citizen has been confirmed dead after a diving accident in the Plura Cave in Rana. Although a defibrillator was used after a short time, his life was not saved.

The following is a first-hand statement given to me by one of the divers involved with the fatal dive. They spoke to me on the evening of 4 April 2023. 

On 22. February 1945 nine Fairey Barracuda from 821 Naval Air Squadron are launched from the aircraft carrier HMS Puncher in the North sea on a minelaying operation along the western coast of Norway, or more specifically Karmsundet which is a narrow strait south of the coastal town of Haugesund.

Statnett, the Norwegian state-owned power grid operator, made the astounding discovery of the lost Karlsruhe cruiser around 488 meters (1,600 feet) below sea level off the Southern coast of Norway, some 13 nautical miles from the port of Kristiansand. Signs of wreckage were first detected three years ago during inspection work when sonar detected a shipwreck only 15 meters from an undersea power cable between Norway and Denmark.

Over the years, new species have been found and existing species have been moved to other genera while other species are new. Thus, our colleague Christian Skauge writes that the Flabellina family has now gone "extinct" in Norway because the species therein have now been reclassified and put into other genera.