Parasite of the Forgotten Dream

The Parasite starts its life as an amoeba that infects the brain of an unsuspecting swimmer. The host starts to experience strange and intense dreams over the next couple of days. After a few weeks the host experiences visions that compel them to return to the sea. When the host has drowned themselves the parasite then explodes out of the head, growing its large fins and tentacles. Don't swim in the ocean at night.