Nazo no kjórjú kiči (E10)

The fish were breeding abnormally at Kitayama lake, and SSSP headed there to find out the cause of it. It seems those fish eat foods that huge creatures left behind. The identity of the gigantic creature was a dinosaur Jirahs. Professor Nikaido had brought back from Loch Ness 15 years ago. The environment around Kitayama lake was very similar to Loch Ness, and Jirahs was growing steadily! (Prime Video)