Ultraman Neos: S1 E8 - Restoration Of Earth, Southward HEART! Ultraman Neos

In the past, Professor Usami made presentations on his theories concerning dark matter activity. Professor Usami has since passed away, but Minato and Ayumi head south to investigate his findings. However, en-route via a large passenger ship, they come across a disturbing red tide. Ayumi tries to calm down the panicked passengers, but the shadow of a giant monster can be seen squirming just below the ocean's surface.