Deep-Sea Gigantism. Why the Ocean Breeds Monsters

We often hear the news that the remains of giant deep-sea creatures were washed ashore after another storm again. Some of them are new even for scientists. And here's the most amazing thing: they all tend to live at depths ranging from one thousand meters. Where even the known species are the most enormous and terrifying monsters. But what other giants are concealed by the ocean? And why can underwater monsters rise to the surface?