Answer:
Prolly Britain
Explanation:
Britain is infamous for being reduced from controlling the world to a tiny island within a century, Japan was still feudal (i believe), America was... being America ig, and Germany wasn't that powerful compared to other European countries.
An atomic bomb was dropped on Hiroshima.
Range. The oarfish is thought to inhabit the epipelagic to mesopelagic ocean layers, ranging from 200 meters (660 ft) to 1,000 meters (3,300 ft) and is rarely seen on the surface. A few have been found still barely alive, but usually if one floats to the surface, it dies.