“Through binoculars and telescopes we saw huge open jaws with a dozen rows of sharp fangs and huge eyes on the sides. His head rose above the water no less than sixty feet ... "A living fossil, an unknown cryptid, a ghost of the imagination, a hero of myths and legends, or the most ancient embodiment of collective horror - the sea serpent has not escaped the fantastic literature of modern times. The unique anthology "From the Deepest Depths" collects works about the sea serpent, covering a period of almost 150 years; many of them were translated into Russian for the first time. The book also contains some newspaper and magazine hoaxes of the 19th–20th centuries, which can easily be classified as fiction. The publication is provided with detailed comments.