Ultraman Dyna: S1 E24 - Vampire Of The Lake Ultraman Dyna

Nakajima gets his first break in a while and visits a lake. He sees an object that looks like round green algae and a large amount of fish dying. Investigation by the TPC Biotechnology Team is carried out immediately, but this is out of Nakajima's jurisdiction and he is removed from the investigation. Moments later, an unimaginable tragedy hits the investigation team!