During a scientific expedition in the Pacific Ocean, an ocean scientist meets an amazing animal that reminds him of an ichthyosaur - a representative of marine reptiles that were once formidable masters of the oceans. But they have long since died out. These animals are a mystery to science. Scientists are persistently searching for answers. And the sea monster is encountered again and again, and unusual adventures are associated with it. The book “In Pursuit of Ichthyosaurs” tells about all this. The author, a geographer, describes in a fascinating way the life of the depths of the oceans and seas, the work of studying the secrets of life.